[media] media: only show V4L devices based on device type selection

After this patch, the MEDIA*_SUPPORT will be used as a filter,
exposing only devices that are pertinent to one of the 3
V4L types: webcam/grabber, radio, analog TV.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
4 files changed