Marvell SOC USB controllers

This controller is integrated in Armada 3700.
It uses the same properties as a generic EHCI host controller

Required properties :
 - compatible: should be one or more of:
   - "marvell,armada3700-ehci", "marvell,orion-ehci"
 - reg: should contain address and length of the standard EHCI
   register set for the device.

Optional properties:
 - vbus-supply : If present, specifies the fixed regulator to be turned on
   for providing power to the USB VBUS rail.

Example:
	usb2: usb@5e000 {
		compatible = "marvell,armada3700-ehci";
		reg = <0x5e000 0x450>;
		vbus-supply = <&reg_usb2_vbus>;
		status = "disabled";
	};