This adds QC10C compressed pixel format in the Venus driver, and
make it possible to discover from v4l2 clients.

Note: The QC10C format will be enumerable via VIDIOC_ENUM_FMT when
the bitstream is 10-bits and the headers are parsed.
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>