ARM: dts: rockchip: enable the gpu on rk3036-kylin boards

Enable the gpu node and add the gpu supply for it.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3036-kylin.dts

@@ -135,6 +135,11 @@
 	status = "okay";
 };
 
+&gpu {
+	mali-supply = <&vdd_gpu>;
+	status = "okay";
+};
+
 &hdmi {
 	status = "okay";
 };