radeon/vcn: fix mpeg4 msg buffer settings

Previous bit-fields assignments are incorrect and will result certain mpeg4
decode failed due to wrong flag values. This patch fixes these assignments.

Signed-off-by: Boyuan Zhang <boyuan.zhang@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
(cherry picked from commit deba56accf4e1f8fc025f34f6cbc069285f76838)
1 file changed