Remove the TU_DEBUG_FLUSHALL option that was force-enabled for a8xx chips.
The problematic CTS cases that required it were failing due to indirect
draw commands sourcing draw data from buffers whose content was prepared
by compute tasks.
Up until a8xx, firmware was managing an implicit wait before any indirect
draw parameters were read, with a delayed CP_WAIT_FOR_ME emitted only when
necessary or on devices enabling indirect_draw_wfm_quirk due to bugged
firmware. That implicit wait is gone on a8xx, so CP_WAIT_FOR_ME should be
emitted immediately, which also matches behavior of the proprietary driver.
Signed-off-by: Zan Dobersek <zdobersek@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40550>
9931034dca