media: cedrus: add check for H264 and H265 limitations

Cedrus supports only YUV420 H264/H265 content and mostly only 8-bit
colours (except on H6, where 10-bit are also supported).

Add validation callback to SPS controls, which will reject unsupported
combinations.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>