NVIDIA Tegra XUSB host copmlex
==============================

The XUSB host complex on Tegra124 and later SoCs contains an xHCI host
controller and a mailbox for communication with the XUSB micro-controller.

Required properties:
--------------------
 - compatible: For Tegra124, must contain "nvidia,tegra124-xusb".
   Otherwise, must contain '"nvidia,<chip>-xusb", "nvidia,tegra124-xusb"'
   where <chip> is tegra132.
 - reg: Must contain the base and length of the XUSB FPCI registers.
 - ranges: Bus address mapping for the XUSB block.  Can be empty since the
   mapping is 1:1.
 - #address-cells: Must be 2.
 - #size-cells: Must be 2.

Example:
--------
	usb@0,70098000 {
		compatible = "nvidia,tegra124-xusb";
		reg = <0x0 0x70098000 0x0 0x1000>;
		ranges;

		#address-cells = <2>;
		#size-cells = <2>;

		usb-host@0,70090000 {
			compatible = "nvidia,tegra124-xhci";
			...
		};

		mailbox {
			compatible = "nvidia,tegra124-xusb-mbox";
			...
		};
	};
