iio: apple-ib-als: remove usage of iio_priv_to_dev() helper

[marcosfad]

Update for Kernel 5.9

[marc-git]

Getting the following error on 5.9.0-2:

DKMS make.log for apple-ibridge-0.1 for kernel 5.9.0-2-amd64 (x86_64)
Sat 14 Nov 15:22:44 CET 2020
make -C /lib/modules/5.9.0-2-amd64/build M=/var/lib/dkms/apple-ibridge/0.1/build modules
make[1]: Entering directory '/usr/src/linux-headers-5.9.0-2-amd64'
  CC [M]  /var/lib/dkms/apple-ibridge/0.1/build/apple-ibridge.o
  CC [M]  /var/lib/dkms/apple-ibridge/0.1/build/apple-ib-tb.o
  CC [M]  /var/lib/dkms/apple-ibridge/0.1/build/apple-ib-als.o
/var/lib/dkms/apple-ibridge/0.1/build/apple-ib-als.c: In function ‘appleals_config_iio’:
/var/lib/dkms/apple-ibridge/0.1/build/apple-ib-als.c:468:28: error: implicit declaration of function ‘iio_priv_to_dev’ [-Werror=implicit-function-declaration]
  468 |  struct iio_dev *iio_dev = iio_priv_to_dev(als_dev);
      |                            ^~~~~~~~~~~~~~~
/var/lib/dkms/apple-ibridge/0.1/build/apple-ib-als.c:468:28: warning: initialization of ‘struct iio_dev *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
cc1: some warnings being treated as errors
make[3]: *** [/usr/src/linux-headers-5.9.0-2-common/scripts/Makefile.build:288: /var/lib/dkms/apple-ibridge/0.1/build/apple-ib-als.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/usr/src/linux-headers-5.9.0-2-common/Makefile:1796: /var/lib/dkms/apple-ibridge/0.1/build] Error 2
make[1]: *** [/usr/src/linux-headers-5.9.0-2-common/Makefile:185: __sub-make] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-5.9.0-2-amd64'
make: *** [Makefile:13: all] Error 2

... when I didn't use your patch!
Then when I used it compiled correctly... but I have no touchbar on MBP 14,3

[marc-git]

Here is the output of :
`sudo cat /var/log/kern.log | grep 'apple'

Nov 12 12:04:14 mbpdeddy kernel: [    1.433534] applespi spi-APP000D:00: modeswitch done.
Nov 12 12:04:14 mbpdeddy kernel: [   59.993591] apple_gmux: Found gmux version 4.0.29 [indexed]
Nov 12 12:04:14 mbpdeddy kernel: [   60.262241] usbcore: registered new device driver apple-mfi-fastcharge
Nov 12 12:04:14 mbpdeddy kernel: [   60.961186] applesmc: key=902 fan=2 temp=46 index=45 acc=0 lux=0 kbd=0
Nov 12 12:04:14 mbpdeddy kernel: [   60.961277] applesmc applesmc.768: hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
Nov 12 14:55:57 mbpdeddy kernel: [    1.381123] applespi spi-APP000D:00: Received corrupted packet (crc mismatch)
Nov 12 14:55:57 mbpdeddy kernel: [    1.381876] applespi spi-APP000D:00: modeswitch done.
Nov 12 14:55:57 mbpdeddy kernel: [   28.485867] apple_gmux: Found gmux version 4.0.29 [indexed]
Nov 12 14:55:57 mbpdeddy kernel: [   28.645316] usbcore: registered new device driver apple-mfi-fastcharge
Nov 12 14:55:57 mbpdeddy kernel: [   29.260918] applesmc: key=902 fan=2 temp=46 index=45 acc=0 lux=0 kbd=0
Nov 12 14:55:57 mbpdeddy kernel: [   29.261067] applesmc applesmc.768: hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
Nov 12 15:10:39 mbpdeddy kernel: [    1.361709] applespi spi-APP000D:00: modeswitch done.
Nov 12 15:10:39 mbpdeddy kernel: [  484.275512] apple_gmux: Found gmux version 4.0.29 [indexed]
Nov 12 15:10:39 mbpdeddy kernel: [  484.506697] usbcore: registered new device driver apple-mfi-fastcharge
Nov 12 15:10:39 mbpdeddy kernel: [  485.021942] applesmc: key=902 fan=2 temp=46 index=45 acc=0 lux=0 kbd=0
Nov 12 15:10:39 mbpdeddy kernel: [  485.022017] applesmc applesmc.768: hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
Nov 12 15:14:31 mbpdeddy kernel: [    1.365705] applespi spi-APP000D:00: modeswitch done.
Nov 12 15:14:31 mbpdeddy kernel: [   24.460255] apple_gmux: Found gmux version 4.0.29 [indexed]
Nov 12 15:14:31 mbpdeddy kernel: [   24.741363] usbcore: registered new device driver apple-mfi-fastcharge
Nov 12 15:14:31 mbpdeddy kernel: [   25.180830] applesmc: key=902 fan=2 temp=46 index=45 acc=0 lux=0 kbd=0
Nov 12 15:14:31 mbpdeddy kernel: [   25.180923] applesmc applesmc.768: hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
Nov 13 09:25:44 mbpdeddy kernel: [    1.377546] applespi spi-APP000D:00: modeswitch done.
Nov 13 09:25:44 mbpdeddy kernel: [   17.458271] apple_gmux: Found gmux version 4.0.29 [indexed]
Nov 13 09:25:44 mbpdeddy kernel: [   17.654163] usbcore: registered new device driver apple-mfi-fastcharge
Nov 13 09:25:44 mbpdeddy kernel: [   18.192528] applesmc: key=902 fan=2 temp=46 index=45 acc=0 lux=0 kbd=0
Nov 13 09:25:44 mbpdeddy kernel: [   18.192628] applesmc applesmc.768: hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
Nov 13 10:30:12 mbpdeddy kernel: [    1.318076] applespi spi-APP000D:00: Received corrupted packet (crc mismatch)
Nov 13 10:30:12 mbpdeddy kernel: [   14.298494] apple_gmux: Found gmux version 4.0.29 [indexed]
Nov 13 10:30:12 mbpdeddy kernel: [   14.428523] usbcore: registered new device driver apple-mfi-fastcharge
Nov 13 10:30:12 mbpdeddy kernel: [   15.053309] applesmc: key=902 fan=2 temp=46 index=45 acc=0 lux=0 kbd=0
Nov 13 10:30:12 mbpdeddy kernel: [   15.053407] applesmc applesmc.768: hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
Nov 13 16:36:52 mbpdeddy kernel: [    1.306264] applespi spi-APP000D:00: modeswitch done.
Nov 13 16:36:52 mbpdeddy kernel: [   28.059867] apple_gmux: Found gmux version 4.0.29 [indexed]
Nov 13 16:36:52 mbpdeddy kernel: [   28.112896] usbcore: registered new device driver apple-mfi-fastcharge
Nov 13 16:36:52 mbpdeddy kernel: [   28.814649] applesmc: key=902 fan=2 temp=46 index=45 acc=0 lux=0 kbd=0
Nov 13 16:36:52 mbpdeddy kernel: [   28.814721] applesmc applesmc.768: hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
Nov 13 16:40:17 mbpdeddy kernel: [  233.699959] apple-mfi-fastcharge 1-5: USB disconnect, device number 3
Nov 14 14:46:55 mbpdeddy kernel: [    1.342262] applespi spi-APP000D:00: modeswitch done.
Nov 14 14:46:55 mbpdeddy kernel: [  104.729299] apple_gmux: Found gmux version 4.0.29 [indexed]
Nov 14 14:46:55 mbpdeddy kernel: [  104.914734] usbcore: registered new device driver apple-mfi-fastcharge
Nov 14 14:46:56 mbpdeddy kernel: [  105.523516] applesmc: key=902 fan=2 temp=46 index=45 acc=0 lux=0 kbd=0
Nov 14 14:46:56 mbpdeddy kernel: [  105.523750] applesmc applesmc.768: hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
Nov 14 15:33:51 mbpdeddy kernel: [ 2920.947297] apple_ibridge: loading out-of-tree module taints kernel.
Nov 14 15:33:51 mbpdeddy kernel: [ 2920.947313] apple_ibridge: module verification failed: signature and/or required key missing - tainting kernel
Nov 14 15:35:32 mbpdeddy kernel: [    1.457439] applespi spi-APP000D:00: Received corrupted packet (crc mismatch)
Nov 14 15:35:32 mbpdeddy kernel: [    1.458253] applespi spi-APP000D:00: modeswitch done.
Nov 14 15:35:32 mbpdeddy kernel: [   13.705849] apple_ibridge: loading out-of-tree module taints kernel.
Nov 14 15:35:32 mbpdeddy kernel: [   13.715497] apple_ibridge: module verification failed: signature and/or required key missing - tainting kernel
Nov 14 15:35:32 mbpdeddy kernel: [   13.716154] apple_gmux: Found gmux version 4.0.29 [indexed]
Nov 14 15:35:32 mbpdeddy kernel: [   13.879040] usbcore: registered new device driver apple-mfi-fastcharge
Nov 14 15:35:33 mbpdeddy kernel: [   14.550099] applesmc: key=902 fan=2 temp=46 index=45 acc=0 lux=0 kbd=0
Nov 14 15:35:33 mbpdeddy kernel: [   14.550284] applesmc applesmc.768: hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
Nov 14 16:11:48 mbpdeddy kernel: [    1.405903] applespi spi-APP000D:00: modeswitch done.
Nov 14 16:11:48 mbpdeddy kernel: [   11.439336] apple_ibridge: loading out-of-tree module taints kernel.
Nov 14 16:11:48 mbpdeddy kernel: [   11.449680] apple_ibridge: module verification failed: signature and/or required key missing - tainting kernel
Nov 14 16:11:48 mbpdeddy kernel: [   11.450391] apple_gmux: Found gmux version 4.0.29 [indexed]
Nov 14 16:11:48 mbpdeddy kernel: [   11.552762] usbcore: registered new device driver apple-mfi-fastcharge
Nov 14 16:11:48 mbpdeddy kernel: [   12.331961] applesmc: key=902 fan=2 temp=46 index=45 acc=0 lux=0 kbd=0
Nov 14 16:11:48 mbpdeddy kernel: [   12.332133] applesmc applesmc.768: hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().

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