pmdomain: arm: Avoid polling for scmi_perf_domain

It was a mistake to prefer polling based mode when setting a performance
level for a domain. Let's instead rely on the protocol to decide what is
best and thus avoid polling when possible.
Reported-by: Nikunj Kela <nkela@quicinc.com>
Fixes: 2af23ceb ("pmdomain: arm: Add the SCMI performance domain")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20231127135033.136442-1-ulf.hansson@linaro.org

drivers/pmdomain/arm/scmi_perf_domain.c

@@ -35,7 +35,7 @@ scmi_pd_set_perf_state(struct generic_pm_domain *genpd, unsigned int state)
 	if (!state)
 		return -EINVAL;
 
-	ret = pd->perf_ops->level_set(pd->ph, pd->domain_id, state, true);
+	ret = pd->perf_ops->level_set(pd->ph, pd->domain_id, state, false);
 	if (ret)
 		dev_warn(&genpd->dev, "Failed with %d when trying to set %d perf level",
 			 ret, state);