c554757bc2
Don't rely on getting a zero'd out buffer, we could hit the bo-cache.
Fixes: 7dabd62464 ("freedreno/drm: Userspace fences")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10567>