In function of gadget unregister the phy will been put to lowpower
mode,however in function of gadget regisger the phy lowpower mode will
not been cleard when OTG pin detect enabled.
Signed-off-by: Huhui <b29976@freescale.com>
(cherry picked from commit 11dc51645fe5a196f53fb30369698b4cb4d1e296)