arm64: dts: renesas: rzg2lc-smarc-som: Add vdd core regulator

Add vdd core regulator (1.1 V) for GPU.

This patch add regulator support for GPU.

The H/W manual mentions nothing about a GPU regulator. So using vdd
core regulator for GPU.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20220307192436.13237-4-biju.das.jz@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/rzg2lc-smarc-som.dtsi

@@ -41,6 +41,15 @@ reg_3p3v: regulator1 {
 		regulator-always-on;
 	};
 
+	reg_1p1v: regulator-vdd-core {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-1.1V";
+		regulator-min-microvolt = <1100000>;
+		regulator-max-microvolt = <1100000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
 	vccq_sdhi0: regulator-vccq-sdhi0 {
 		compatible = "regulator-gpio";
 
@@ -84,6 +93,10 @@ &extal_clk {
 	clock-frequency = <24000000>;
 };
 
+&gpu {
+	mali-supply = <&reg_1p1v>;
+};
+
 &ostm1 {
 	status = "okay";
 };