ocl: fixed parsing list of allowed device #1369

Job	Run time
build-on-cuda (OPENMP=ON)	11m 30s
build-on-opencl (OPENMP=ON, SMM=libxsmm)	11m 23s
build-and-test (MPI=ON, OPENMP=ON, SMM=blas, openmpi)	7m 28s
build-on-rocm (OPENMP=ON)	11m 37s
build-and-test (MPI=ON, OPENMP=ON, SMM=blas, mpich)	9m 8s
pre-commit	1m 40s
build-and-test (MPI=ON, OPENMP=ON, SMM=libxsmm, openmpi)	7m 15s
build-and-test (MPI=ON, OPENMP=ON, SMM=libxsmm, mpich)	6m 27s
build-and-test (MPI=ON, OPENMP=OFF, SMM=blas, openmpi)	4m 23s
build-and-test (MPI=ON, OPENMP=OFF, SMM=blas, mpich)	5m 8s
build-and-test (MPI=ON, OPENMP=OFF, SMM=libxsmm, openmpi)	4m 19s
build-and-test (MPI=ON, OPENMP=OFF, SMM=libxsmm, mpich)	5m 29s
build-and-test (MPI=OFF, OPENMP=ON, SMM=blas, openmpi)	7m 45s
build-and-test (MPI=OFF, OPENMP=ON, SMM=libxsmm, openmpi)	7m 31s
build-and-test (MPI=OFF, OPENMP=OFF, SMM=blas, openmpi)	4m 26s
build-and-test (MPI=OFF, OPENMP=OFF, SMM=libxsmm, openmpi)	3m 57s
Combine & check coverage.	1m 16s
	1h 50m 42s

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