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PIPE_CONTROL gained a new field in its first DWORD on Gen11. We had no use for it so far, but we start using it on Gen12. Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3408>