net: napi_watchdog() can use napi_schedule_irqoff()

hrtimer handlers run with masked hard IRQ, we can therefore
use napi_schedule_irqoff()
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/core/dev.c

@@ -5089,7 +5089,7 @@ static enum hrtimer_restart napi_watchdog(struct hrtimer *timer)
 
 	napi = container_of(timer, struct napi_struct, timer);
 	if (napi->gro_list)
-		napi_schedule(napi);
+		napi_schedule_irqoff(napi);
 
 	return HRTIMER_NORESTART;
 }