ARM: dts: OMAP4: Add omap-usb2 data

Add omap-usb2 data node in omap4 device tree file. Since omap-usb2
is connected to ocp2scp, omap-usb2 dt data is added as a child node
of ocp2scp. The information about this data node is availabe @
Documentation/devicetree/bindings/usb/usb-phy.txt

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>

arch/arm/boot/dts/omap4.dtsi

@@ -438,6 +438,11 @@
 			#size-cells = <1>;
 			ranges;
 			ti,hwmods = "ocp2scp_usb_phy";
+			usb2_phy: usb2phy@4a0ad080 {
+				compatible = "ti,omap-usb2";
+				reg = <0x4a0ad080 0x58>;
+				ctrl-module = <&omap_control_usb>;
+			};
 		};
 
 		timer1: timer@4a318000 {