usb: host: USB 3.0 detection is improved.

USB 3.0 core voltage is increased to improve USB host detection
from 3.0V to 3.3V.

Change-Id: I662eb56a7417acbfac2ff800361f31d95ea4745b
usb: otg gadget driver fix

Change-Id: Ie3a97c72171e372e6f427fe08c0f64d6a43c9c25