sched: Remove noop in next_prio()

When computing the next priority for a given run-queue, the check for
RT priority of the task determined by the pick_next_highest_task_rt()
function could be removed, since only RT tasks are returned by the
function.

Reviewed-by: Yong Zhang <yong.zhang0@gmail.com>
Signed-off-by: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/BANLkTimxmWiof9s5AvS3v_0X+sMiE=0x5g@mail.gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/sched_rt.c

@@ -704,7 +704,7 @@ static inline int next_prio(struct rq *rq)
 {
 	struct task_struct *next = pick_next_highest_task_rt(rq, rq->cpu);
 
-	if (next && rt_prio(next->prio))
+	if (next)
 		return next->prio;
 	else
 		return MAX_RT_PRIO;