Merge branch 'tracking-qcomlt-usb' into integration-linux-qcomlt

* tracking-qcomlt-usb:
  drivers: usb: Add bus scaling suppport
  usb: host: ehci-msm: Use posted data writes on AHB
  usb: chipidea: msm: Use posted data writes on AHB
  usb: phy: msm: Unregister VBUS and ID events notifiers
  usb: phy: msm: Ensure that workers are initialized before use
  usb: phy: msm: Disable driver runtime PM
  usb: phy: msm: HACK: Make Vddc configuration optional
  usb: chipidea: Use extcon framework for VBUS and ID detect