ARM: dts: omap5-igep0050: Allow bootloader to configure USB Ethernet MAC

This is slightly different wiring compared to omap5-uevm or pandaboard:

/sys/bus/usb/devices/3-2 hub
/sys/bus/usb/devices/3-2.3 7500

Cc: Laurent Pinchart <[e-mail]>
Signed-off-by: Tony Lindgren <[e-mail]>

arch/arm/boot/dts/omap5-igep0050.dts

···
 		reg = <0x0 0x80000000 0 0x7f000000>;	/* 2032 MB */
 	};
 
+	aliases {
+		ethernet = &ethernet;
+	};
+
 	gpio_keys {
 		compatible = "gpio-keys";
 		pinctrl-0 = <&power_button_pin>;
···
 		OMAP5_IOPAD(0x1c4, PIN_OUTPUT | MUX_MODE6)	/* mcspi1_somi.gpio5_144 */
 		OMAP5_IOPAD(0x1ca, PIN_OUTPUT | MUX_MODE6)	/* perslimbus2_clock.gpio5_145 */
 	>;
+};
+
+&usbhsehci {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	hub@2 {
+		compatible = "usb424,3503";
+		reg = <2>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ethernet: usbether@3 {
+			compatible = "usb424,7500";
+			reg = <3>;
+		};
+	};
 };