amphion decoder add support for the RealVideo video.
RV30 and RV40 are support by amphion decoder.
Signed-off-by: NMing Qian <ming.qian@nxp.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@kernel.org>