radeonsi/vcn: fix hevc size issue
What does this MR do and why?
This is to enable the alignment attribute of HEVC encoding, then fix the
hevc size issue.
Please note that applications such as FFmpeg or Gstreamer need
to use the surface alignment attribute to enable this fix, and it
also needs to update VCN FWs to the latest for different VCNs.
Cc: mesa-stable
Fixes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/9196
Signed-off-by: Ruijing Dong <ruijing.dong@amd.com>