Add a new media entity function definition for digital TV decoders:
MEDIA_ENT_F_DTV_DECODER
Signed-off-by: NTim Harvey <tharvey@gateworks.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>