ARM: dts: BCM5301X: Specify USB controllers in DT

There are 3 separated controllers, one per USB /standard/. With PHY
drivers in place they can be simply supported with generic drivers.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm5301x.dtsi

@@ -248,15 +248,46 @@ usb2: usb2@21000 {
 
 			#address-cells = <1>;
 			#size-cells = <1>;
+			ranges;
+
+			interrupt-parent = <&gic>;
+
+			ehci: ehci@21000 {
+				#usb-cells = <0>;
 
+				compatible = "generic-ehci";
+				reg = <0x00021000 0x1000>;
+				interrupts = <GIC_SPI 79 IRQ_TYPE_LEVEL_HIGH>;
 				phys = <&usb2_phy>;
 			};
 
+			ohci: ohci@22000 {
+				#usb-cells = <0>;
+
+				compatible = "generic-ohci";
+				reg = <0x00022000 0x1000>;
+				interrupts = <GIC_SPI 79 IRQ_TYPE_LEVEL_HIGH>;
+			};
+		};
+
 		usb3: usb3@23000 {
 			reg = <0x00023000 0x1000>;
 
 			#address-cells = <1>;
 			#size-cells = <1>;
+			ranges;
+
+			interrupt-parent = <&gic>;
+
+			xhci: xhci@23000 {
+				#usb-cells = <0>;
+
+				compatible = "generic-xhci";
+				reg = <0x00023000 0x1000>;
+				interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
+				phys = <&usb3_phy>;
+				phy-names = "usb";
+			};
 		};
 
 		spi@29000 {