media: amphion: add vpu v4l2 m2m support

vpu_v4l2.c implements the v4l2 m2m driver methods.
vpu_helpers.c implements the common helper functions
vpu_color.c converts the v4l2 colorspace with
the VUI parameters that specified by ITU-T | ISO/IEC

Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Shijie Qin <shijie.qin@nxp.com>
Signed-off-by: Zhou Peng <eagle.zhou@nxp.com>
Reported-by: kernel test robot <lkp@intel.com>
Tested-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>