radeonsi/vcn: make VDPAU work with AOT
What does this MR do and why?
radeonsi/vcn: make VDPAU work with AOT
By dropping expect_chunked_decode, VDPAU will use AOT DPB type
for decoding. This applyies to VCN 3/4/5 at the moment.
Signed-off-by: David (Ming Qiang) Wu <David.Wu3@amd.com>