ARM: dts: rmobile: r8a77990: Add USB2.0(EHCI) DT nodes on Ebisu

Add device tree nodes for USB2.0(EHCI) on R-Car E3 Ebisu board.

Signed-off-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
diff --git a/arch/arm/dts/r8a77990-ebisu.dts b/arch/arm/dts/r8a77990-ebisu.dts
index 8b0d24b..5e3c195 100644
--- a/arch/arm/dts/r8a77990-ebisu.dts
+++ b/arch/arm/dts/r8a77990-ebisu.dts
@@ -65,6 +65,10 @@
 	};
 };
 
+&ehci0 {
+	status = "okay";
+};
+
 &extal_clk {
 	clock-frequency = <48000000>;
 };
@@ -101,6 +105,18 @@
 		function = "sdhi3";
 		power-source = <1800>;
 	};
+
+	usb0_pins: usb0 {
+		groups = "usb0";
+		function = "usb0";
+	};
+};
+
+&usb2_phy0 {
+	pinctrl-0 = <&usb0_pins>;
+	pinctrl-name = "default";
+
+	status = "okay";
 };
 
 &sdhi0 {