fourcc: VDPAU surface types

fourcc: VDPAU surface types

This define several codec identifiers for each of the VDPAU video
surface types (YUV 4:2:0 and 4:2:2) and one for VDPAU output surfaces
regardless of their internal type. (At this point, it does not seem
that the output surface type affects VLC processes).
VDPAU bitmap surfaces are not included as they do not seem useful.

VDPAU pictures have zero pixel planes since they only carry picture
infos and handles to GPU resources, no actual pixel data. Nevertheless,
inclusion in chroma description is required for picture setup to work.