sched: EAS/WALT: finish accounting prior to task_tick

In order to set rq->misfit_task in time, call update_task_ravg() prior
to task_tick.  This reduces upmigration delay by 1 scheduler window.

Change-Id: I7cc80badd423f2e7684125fbfd853b0a3610f0e8
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>

Author: Joonwoo Park

kernel/sched/core.c

@@ -3048,11 +3048,11 @@ void scheduler_tick(void)
 
 	raw_spin_lock(&rq->lock);
 	walt_set_window_start(rq);
+	walt_update_task_ravg(rq->curr, rq, TASK_UPDATE,
+			walt_ktime_clock(), 0);
 	update_rq_clock(rq);
 	curr->sched_class->task_tick(rq, curr, 0);
 	update_cpu_load_active(rq);
-	walt_update_task_ravg(rq->curr, rq, TASK_UPDATE,
-			walt_ktime_clock(), 0);
 	calc_global_load_tick(rq);
 	sched_freq_tick(cpu);
 	raw_spin_unlock(&rq->lock);