tick/broadcast: Remove redundant check

tick_device_is_functional() is called early in tick_broadcast_control(), so
no need to call it again later.
Signed-off-by: NPeng Hao <peng.hao2@zte.com.cn>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: fweisbec@gmail.com
Link: https://lkml.kernel.org/r/1538150608-2599-1-git-send-email-penghao122@sina.com.cn

kernel/time/tick-broadcast.c

@@ -400,8 +400,6 @@ void tick_broadcast_control(enum tick_broadcast_mode mode)
 		if (tick_broadcast_forced)
 			break;
 		cpumask_clear_cpu(cpu, tick_broadcast_on);
-		if (!tick_device_is_functional(dev))
-			break;
 		if (cpumask_test_and_clear_cpu(cpu, tick_broadcast_mask)) {
 			if (tick_broadcast_device.mode ==
 			    TICKDEV_MODE_PERIODIC)