sched: Move sched_domains_numa_masks_clear() to DOWN_PREPARE

This is the last operation on the cpu before vanishing. No point in calling
that on CPU_DEAD.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: rt@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/sched/core.c

@@ -7139,9 +7139,6 @@ static int sched_cpu_inactive(struct notifier_block *nfb,
 			set_cpu_active(cpu, true);
 			return notifier_from_errno(ret);
 		}
-		return NOTIFY_OK;
-
-	case CPU_DEAD:
 		sched_domains_numa_masks_clear(cpu);
 		return NOTIFY_OK;
 	default: