aco: run p_wqm instructions in WQM

aco: run p_wqm instructions in WQM

If the p_wqm ends up creating copies, these need to be in WQM. Helps (but
doesn't completely fix) artifacts in Strange Brigade. The actual issue
still exists and is harder to fix.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Fixes: 93c8ebfa780 ('aco: Initial commit of independent AMD compiler')
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3273>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3273>