ARM: mvebu: add Device Tree description of the EHCI controller on Armada 38x

The Marvell Armada 38x SoCs contains one EHCI controller. This commit
adds the Device Tree description of this interface at the SoC level,
and also enables the USB2 port on the Armada 385 DB platform.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Link: https://lkml.kernel.org/r/1400149062-32661-16-git-send-email-gregory.clement@free-electrons.comSigned-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/armada-385-db.dts

@@ -64,6 +64,10 @@ ethernet@30000 {
 				phy-mode = "rgmii-id";
 			};
 
+			usb@50000 {
+				status = "ok";
+			};
+
 			ethernet@70000 {
 				status = "okay";
 				phy = <&phy0>;

arch/arm/boot/dts/armada-38x.dtsi

@@ -312,6 +312,14 @@ eth2: ethernet@34000 {
 				status = "disabled";
 			};
 
+			usb@50000 {
+				compatible = "marvell,orion-ehci";
+				reg = <0x58000 0x500>;
+				interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&gateclk 18>;
+				status = "disabled";
+			};
+
 			xor@60800 {
 				compatible = "marvell,orion-xor";
 				reg = <0x60800 0x100