usb: musb: Add missing ATOMIC_INIT_NOTIFIER_HEAD

&twl->phy.notifier is not initalized
Signed-off-by: NPali Rohár <pali.rohar@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/phy/phy-twl4030-usb.c

@@ -705,6 +705,8 @@ static int twl4030_usb_probe(struct platform_device *pdev)
 	if (device_create_file(&pdev->dev, &dev_attr_vbus))
 		dev_warn(&pdev->dev, "could not create sysfs file\n");
 
+	ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier);
+
 	/* Our job is to use irqs and status from the power module
 	 * to keep the transceiver disabled when nothing's connected.
 	 *