ARM: dts: Add device tree bindings for dwc3-exynos

		clocks = <&clock 285>;

		clocks = <&clock 285>;

		clock-names = "usbhost";

		clock-names = "usbhost";

	};

	};

DWC3

Required properties:

 - compatible: should be "samsung,exynos5250-dwusb3" for USB 3.0 DWC3

	       controller.

 - #address-cells, #size-cells : should be '1' if the device has sub-nodes

				 with 'reg' property.

 - ranges: allows valid 1:1 translation between child's address space and

	   parent's address space

 - clocks: Clock IDs array as required by the controller.

 - clock-names: names of clocks correseponding to IDs in the clock property

Sub-nodes:

The dwc3 core should be added as subnode to Exynos dwc3 glue.

- dwc3 :

   The binding details of dwc3 can be found in:

   Documentation/devicetree/bindings/usb/dwc3.txt

Example:

	usb@12000000 {

		compatible = "samsung,exynos5250-dwusb3";

		clocks = <&clock 286>;

		clock-names = "usbdrd30";

		#address-cells = <1>;

		#size-cells = <1>;

		ranges;

		dwc3 {

			compatible = "synopsys,dwc3";

			reg = <0x12000000 0x10000>;

			interrupts = <0 72 0>;

			usb-phy = <&usb2_phy &usb3_phy>;

		};

	};