mxf: Add uncompressed 422 8-bit rawvideo UL

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
mxf: Add DNxHD UL

Note that the old DNxHD UL is actually JPEG 2000 according to RP224.
Leaving it as-is for now.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>