Vega20 UVD Firmware has a new version naming convention:
[31, 30] for encode interface major
[29, 24] for encode interface minor
[15, 8] for decode interface minor
[7, 0] for hardware family id
Signed-off-by: James Zhu <James.Zhu@amd.com> Reviewed-by: Leo Liu <leo.liu@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>