[media] TM6000: alsa: Clean up kernel coding style errors

There were several coding style errors as reported by checkpatch.pl. This
patch should fix those errors with the single exception of the open square
bracket issue on line 45.

[mchehab@redhat.com: Fix a merge conflict]
Signed-off-by: Adam M. Dutko <dutko.adam@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>