Registers DWC3's ULPI interface with the ULPI bus when it's
available.
Signed-off-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: NDavid Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>