ST SPEAr SoC USB controllers:
-----------------------------

EHCI:
-----

Required properties:
- compatible: "st,spear600-ehci"
- interrupt-parent: Should be the phandle for the interrupt controller
  that services interrupts for this device
- interrupts: Should contain the EHCI interrupt

Example:

	ehci@e1800000 {
		compatible = "st,spear600-ehci", "usb-ehci";
		reg = <0xe1800000 0x1000>;
		interrupt-parent = <&vic1>;
		interrupts = <27>;
	};


OHCI:
-----

Required properties:
- compatible: "st,spear600-ohci"
- interrupt-parent: Should be the phandle for the interrupt controller
  that services interrupts for this device
- interrupts: Should contain the OHCI interrupt

Example:

	ohci@e1900000 {
		compatible = "st,spear600-ohci", "usb-ohci";
		reg = <0xe1800000 0x1000>;
		interrupt-parent = <&vic1>;
		interrupts = <26>;
	};
