Copy usb_otg_descriptor from config's descriptor if host requests
USB_DT_OTG.
Signed-off-by: NMacpaul Lin <macpaul@gmail.com>
Signed-off-by: NLi Jun <jun.li@freescale.com>
Reviewed-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>