This reverts commit 9e67d3f237.
We do not, in fact, implement texture barriers. Texture barriers are
supposed to allow non-overlapping rendering feedback loops. We cannot
support that at non-tile boundaries when texture compression is enabled
without some kind of downgrade path or other special handling.
Fixes Emacs corruption on X/Glamor.
Signed-off-by: Asahi Lina <lina@asahilina.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23832>
af895692b3