spin_unlock_irqrestore() was not being called in the error path of
usb_get_phy. It's fixed here.
Reported-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>