sched: Convert cpupri lock to raw_spinlock

Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>

kernel/sched_cpupri.h

@@ -12,7 +12,7 @@
 /* values 2-101 are RT priorities 0-99 */
 
 struct cpupri_vec {
-	spinlock_t lock;
+	raw_spinlock_t lock;
 	int        count;
 	cpumask_var_t mask;
 };