a89752d630
There can be other writes to the dstBuffer gated by proper barriers
beforehand.
TEST=dEQP-VK.pipeline.*.timestamp.* with Venus on Turnip
Fixes: 487aa807bd ("tu: Rewrite flushing to use barriers")
Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24245>