st/vdpau: disable RefPicList for Vdpau HEVC
st/vdpau: disable RefPicList for Vdpau HEVC

Signed-off-by: Boyuan Zhang <8cfb4a4fd3f1d146f6a03a94195b31d5559cee7b@amd.com>
Reviewed-by: Christian König <c7ea837d7a46effe4232b086213468b8b31643bf@amd.com>
Reviewed-by: Leo Liu <2cc5244297c0b82e7ea531cc4a868153602775b7@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler