r600/sfn: Handle memory_barrier

I'm not sure whether this should actually be a barrier accross all
shader processing units, the TGSI code path seems to handle this
only by using GROUP_BARRIER, so let's do the same here.

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5206>
1 file changed