frontends/va: Fix H264 top/bottom is reference flags

All pics in the ReferenceFrames array should be references,
so there is no need to require the SHORT_TERM_REFERENCE flag
to actually treat them as references.
This fixes decoding with apps that doesn't set this flag,
eg. NoMachine remote desktop viewer (nxplayer).

See: https://gitlab.freedesktop.org/mesa/mesa/-/issues/13229
Cc: mesa-stable
Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35186>
1 file changed