sunxi: Register usb_ether

Call the function to register the usb_ether gadget in the board.

Reviewed-by: Łukasz Majewski <lukma@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

board/sunxi/board.c

@@ -737,6 +737,8 @@ int misc_init_r(void)
 		return ret;
 #endif
 
+	usb_ether_init();
+
 	return 0;
 }