cpufreq: schedutil: stop freq update when not changing

The sugov_update_commit path is proceeding with the
normal path even when the frequency isn't actually
changing. That has multiple bad results, including
waking up sugov for no reason and updating the last
frequency update-time when it hasn't actually
changed (which can delay/inhibit future updates).

Bug: 78144764
Change-Id: I252ca6de66507ade8820204f5c8f8959f12714f7
Signed-off-by: John Dias <joaodias@google.com>
Signed-off-by: onettboots <blackcocopet@gmail.com>
Signed-off-by: Yahya Wessam <yahyawessam2002@gmail.com>

Author: John Dias

kernel/sched/cpufreq_schedutil.c

@@ -167,6 +167,9 @@ static void sugov_update_commit(struct sugov_policy *sg_policy, u64 time,
 		return;
 	}
 
+	if (sg_policy->next_freq == next_freq)
+		return;
+
 	sg_policy->next_freq = next_freq;
 	sg_policy->last_freq_update_time = time;