aco: Treat s_setprio as a scheduling barrier.

aco: Treat s_setprio as a scheduling barrier.

We want to execute instructions after s_setprio in the given
priority, so we must prevent the scheduler from scheduling beyond
s_setprio, otherwise some instructions could be executed in a
different priority.

Rename hazard_fail_memtime to hazard_fail_unreorderable and include
s_setprio in the list of unreorderable opcodes.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3576>