Init and update otg capabilities by DT, set gadget's otg capabilities
accordingly.
Acked-by: NPeter Chen <peter.chen@freescale.com>
Reviewed-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NLi Jun <jun.li@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>