arm64: dts: allwinner: h6: Enable CPU opp tables for Tanix TX6

Enable CPU opp tables for Tanix TX6.

Also add the fixed regulator that provided vdd-cpu-gpu required for
CPU opp tables.

This voltage has been found using a voltmeter and could be wrong.
Tested-by: Jernej Škrabec <jernej.skrabec@gmail.com>
Signed-off-by: Clément Péron <peron.clem@gmail.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>

arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts

@@ -4,6 +4,7 @@
 /dts-v1/;
 
 #include "sun50i-h6.dtsi"
+#include "sun50i-h6-cpu-opp.dtsi"
 
 #include <dt-bindings/gpio/gpio.h>
 
@@ -37,6 +38,17 @@ reg_vcc3v3: vcc3v3 {
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
 	};
+
+	reg_vdd_cpu_gpu: vdd-cpu-gpu {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd-cpu-gpu";
+		regulator-min-microvolt = <1135000>;
+		regulator-max-microvolt = <1135000>;
+	};
+};
+
+&cpu0 {
+	cpu-supply = <&reg_vdd_cpu_gpu>;
 };
 
 &de {
@@ -56,6 +68,7 @@ &ehci3 {
 };
 
 &gpu {
+	mali-supply = <&reg_vdd_cpu_gpu>;
 	status = "okay";
 };