[media] cx231xx: better handle the master port enable command

Improves the logic, for it to be clearer and to avoid having
board-dependent config there.

Acked-by: Sri Deevi <Srinivasa.Deevi@conexant.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
4 files changed