arm64: dts: imx8mm-venice-gw7901: add cpu-supply node for cpufreq

Add regulator config for cpu-supply in order to support cpufreq.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts

@@ -242,6 +242,22 @@ reg_wifi: regulator-wifi {
 	};
 };
 
+&A53_0 {
+	cpu-supply = <&buck2>;
+};
+
+&A53_1 {
+	cpu-supply = <&buck2>;
+};
+
+&A53_2 {
+	cpu-supply = <&buck2>;
+};
+
+&A53_3 {
+	cpu-supply = <&buck2>;
+};
+
 &ddrc {
 	operating-points-v2 = <&ddrc_opp_table>;
 
@@ -511,7 +527,7 @@ BUCK1 {
 			};
 
 			/* vdd_arm: 0.805-1.0V (typ=0.9V) */
-			BUCK2 {
+			buck2: BUCK2 {
 				regulator-name = "buck2";
 				regulator-min-microvolt = <700000>;
 				regulator-max-microvolt = <1300000>;