arm64: dts: add support for S4 power domain controller

Enable power domain controller for Meson s4 SoC
Signed-off-by: Shunzhou Jiang <shunzhou.jiang@amlogic.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220401110306.3364551-1-shunzhou.jiang@amlogic.com

arch/arm64/boot/dts/amlogic/meson-s4.dtsi

@@ -61,6 +61,12 @@ xtal: xtal-clk {
 		#clock-cells = <0>;
 	};
 
+	pwrc: power-controller {
+		compatible = "amlogic,meson-s4-pwrc";
+		#power-domain-cells = <1>;
+		status = "okay";
+	};
+
 	soc {
 		compatible = "simple-bus";
 		#address-cells = <2>;