There's no reason to hand-roll all of the memory re-allocation fall-back
code for compute shaders. It's just duplicated complexity. This also
makes it more clear in flush_compute_state where the
MEDIA_INTERFACE_DESCRIPTOR_LOAD command gets emitted relative to other
packets in the command stream.
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>