r8169: switch to napi_schedule_irqoff

napi_schedule() is called from hard irq context, so we can switch to
napi_schedule_irqoff() and avoid some overhead.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/realtek/r8169.c

@@ -7473,7 +7473,7 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
 			handled = 1;
 
 			rtl_irq_disable(tp);
-			napi_schedule(&tp->napi);
+			napi_schedule_irqoff(&tp->napi);
 		}
 	}
 	return IRQ_RETVAL(handled);