ARM: dts: rockchip: enable io-domain for rk3229-evb

This patch enables io-domain support for rk3229-evb board.

The power domain of VCCIO3 is selected from maskrom, so we do not
need to configure it.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3229-evb.dts

@@ -173,6 +173,14 @@ &gmac {
 	status = "okay";
 };
 
+&io_domains {
+	status = "okay";
+
+	vccio1-supply = <&vccio_3v3>;
+	vccio2-supply = <&vccio_1v8>;
+	vccio4-supply = <&vccio_3v3>;
+};
+
 &pinctrl {
 	usb {
 		host_vbus_drv: host-vbus-drv {