sched: fix smart grid usage count

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7D98G
CVE: NA

----------------------------------------

smart_grid_usage_dec() should called when free taskgroup
if the mode is auto.
Signed-off-by: NHui Tang <tanghui20@huawei.com>
Reviewed-by: NZhang Qiao <zhangqiao22@huawei.com>
Signed-off-by: NZhang Changzhong <zhangchangzhong@huawei.com>

kernel/sched/fair.c

@@ -5687,6 +5687,9 @@ static void destroy_auto_affinity(struct task_group *tg)
 {
 	struct auto_affinity *auto_affi = tg->auto_affinity;
 
+	if (auto_affi->mode)
+		smart_grid_usage_dec();
+
 	hrtimer_cancel(&auto_affi->period_timer);
 	free_affinity_domains(&auto_affi->ad);