Some tvp5150 variants, have an internal generator that can generate a
black screen output. Since this is a HW block, it should be in the HW
inputs list.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>