media: vicodec: add support for 4 new RGB32 pixelformats

Add support for V4L2_PIX_FMT_BGRA/X32 and V4L2_PIX_FMT_RGBA/X32 formats.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>