Used devres API's to associate the phy with a device so that on
driver detach, release function is invoked on the devres data(usb_phy)
and devres data(usb_phy) is released.
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>