a248b2a4eb
MCS buffers are never allocated on Broadwell, so this does nothing for now, but puts the infrastructure in place for when they do exist. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> Reviewed-by: Ben Widawsky <ben@bwidawsk.net>