Merge snapshot of bindings from android-mainline commit cbf07d5
("FROMLIST: clk: sunxi-ng: add support for the Allwinner A100 CCU").
Change-Id: Ica9bc8abf055fb28bdcd33dad244e3ba5fe1a04b
Document bindings for optional vbus-out-gpio which is used to
turn on VBUS when the ID pin is detected low and the port
enters USB host mode.
Change-Id: I1c91da47c006f79e85bcf8fef5791cfde6de70fb