usb: otg: twl: add missing IRQF_ONESHOT

this patch fixes the following warning:

[    2.825378] genirq: Threaded irq requested \
	with handler=NULL and !ONESHOT for irq 363

Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/otg/twl4030-usb.c

@@ -651,8 +651,8 @@ static int __devinit twl4030_usb_probe(struct platform_device *pdev)
 	 */
 	twl->irq_enabled = true;
 	status = request_threaded_irq(twl->irq, NULL, twl4030_usb_irq,
-			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
-			"twl4030_usb", twl);
+			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
+			IRQF_ONESHOT, "twl4030_usb", twl);
 	if (status < 0) {
 		dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n",
 			twl->irq, status);