freedreno/ir3/postsched: reset sfu_delay on sync

Once we schedule an instruction that will require an `(ss)` sync flag,
there is no need to delay any further instructions that consume an
SFU result (until the next SFU instruction is scheduled).

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4923>
2 files changed