frontends/va: Handle dynamic resolution/SVC for VP9

VP9 allows frame to use another resolution frame as reference
frames so updating the resolution for decoder when there is a
resolution change.

Signed-off-by: Satyajit Sahu <satyajit.sahu@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5646>
2 files changed