[Libva] [PATCH][libva-intel-driver] vpp chroma-formats: report supported chroma formats for vpp

[Xiang, Haihao]

> I sent a new version, pardon the PEBKAC. Is there a particular
> indentation scheme to follow?
> 

The original file uses 4 spaces (not a tab) for indentation, please use
the same indentation in the patch. Sometimes a patch was merged without
checking the indentation, which makes the code harder to read.

Thanks
Haihao