VIA VT8500 and Wondermedia WM8xxx SoC USB controllers.

Required properties:
 - compatible: Should be "via,vt8500-ehci" or "wm,prizm-ehci".
 - reg: Address range of the ehci registers. size should be 0x200
 - interrupts: Should contain the ehci interrupt.

usb: ehci@D8007100 {
	compatible = "wm,prizm-ehci", "usb-ehci";
	reg = <0xD8007100 0x200>;
	interrupts = <1>;
};
