am33xx: board: init usb ether gadget for rndis support

Add usb ether gadget device with usb_ether_init() when
CONFIG_DM_ETH and CONFIG_USB_ETHER are defined.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/mach-omap2/am33xx/board.c

@@ -204,6 +204,14 @@ int arch_misc_init(void)
 	ret = uclass_first_device(UCLASS_MISC, &dev);
 	if (ret || !dev)
 		return ret;
+
+#if defined(CONFIG_DM_ETH) && defined(CONFIG_USB_ETHER)
+	ret = usb_ether_init();
+	if (ret) {
+		error("USB ether init failed\n");
+		return ret;
+	}
+#endif
 #endif
 	return 0;
 }