radeonsi/vcn: set accurate size for dec header and index_codec
What does this MR do and why?
radeonsi/vcn: set accurate size for dec header and index_codec
Each codec has its own size in the dec message,
for example: AVC has sizeof(rvcn_dec_message_avc_t) and
AV1 has sizeof(rvcn_dec_message_av1_t)
This patch will set the correct size for indec_codec section
and set the total_size properly for the dec message header.
Signed-off-by: David (Ming Qiang) Wu <David.Wu3@amd.com>