Merge changes Id94b02fd,Ia52e9d65,I6a79acd1,I6533490a into msm-3.4

* changes:
  usb: xhci: Fix forbidden warning for unused function.
  usb: dwc3: Set dma mask for USB3.0 dwc3 driver
  usb: dwc3: core: split host address space
  usb: dwc3: Introduce OTG driver for dwc3