sched/rt: Make init_sched_rt_calss() __init

It's a bootstrap function.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/52F5CC09.1080502@huawei.comSigned-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

kernel/sched/rt.c

@@ -1849,7 +1849,7 @@ static void switched_from_rt(struct rq *rq, struct task_struct *p)
 		resched_task(rq->curr);
 }
 
-void init_sched_rt_class(void)
+void __init init_sched_rt_class(void)
 {
 	unsigned int i;