sched: mark sched_create_sysfs_power_savings_entries() as __init

Impact: cleanup

The only caller is cpu_dev_init() which is marked as __init.
Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

kernel/sched.c

@@ -8060,7 +8060,7 @@ static SYSDEV_CLASS_ATTR(sched_smt_power_savings, 0644,
 		   sched_smt_power_savings_store);
 #endif
 
-int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
+int __init sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
 {
 	int err = 0;