genirq: Convert irq_desc.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/irq/migration.c

@@ -27,7 +27,7 @@ void move_masked_irq(int irq)
 	if (!desc->chip->set_affinity)
 		return;
 
-	assert_spin_locked(&desc->lock);
+	assert_raw_spin_locked(&desc->lock);
 
 	/*
 	 * If there was a valid mask to work with, please