phy: Use dt-bindig definations for npcm usb phy
Use dt-binding definations for the phy switch connection.
It declares the target usb controller it is connected to.
Signed-off-by: 
Jim Liu <JJLIU0@nuvoton.com>
Use dt-binding definations for the phy switch connection.
It declares the target usb controller it is connected to.
Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>