arm64: dts: rockchip: Enable gpu on Cool Pi 4B

Enable mali gpu node and add the board specific supply-regulator.
Signed-off-by: Andy Yan <andyshrk@163.com>
Link: https://lore.kernel.org/r/20240330100134.3588223-2-andyshrk@163.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3588s-coolpi-4b.dts

@@ -203,6 +203,11 @@ &cpu_b2 {
 	cpu-supply = <&vdd_cpu_big1_s0>;
 };
 
+&gpu {
+	mali-supply = <&vdd_gpu_s0>;
+	status = "okay";
+};
+
 &i2c0 {
 	pinctrl-0 = <&i2c0m2_xfer>;
 	status = "okay";