freedreno: Lock access to msm_pipe for RB object suballocation.
Hopefully this fixes the flakes that have happened since the suballoc changes.
Fixes: 737d4caa ("freedreno: Suballocate our long-lived ring objects.")
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Hopefully this fixes the flakes that have happened since the suballoc changes.
Fixes: 737d4caa ("freedreno: Suballocate our long-lived ring objects.")