arm64: dts: rockchip: rk3326/px30: add pmic pwrkey node

pwrkey node is necessary for U-Boot RK817/RK809 pwrkey driver,
because the device-driver model requires it to make a match.

Change-Id: Ica766232646ba93508592ab1a20b65157859d688
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>

Author: JosephChen2017

arch/arm64/boot/dts/rockchip/px30-evb-ddr3-v10.dts

@@ -332,6 +332,10 @@
 		vcc8-supply = <&vcc3v3_sys>;
 		vcc9-supply = <&vcc5v0_sys>;
 
+		pwrkey {
+			status = "okay";
+		};
+
 		regulators {
 			vdd_logic: DCDC_REG1 {
 				regulator-always-on;

arch/arm64/boot/dts/rockchip/px30-evb-ddr4-v10.dts

@@ -332,6 +332,10 @@
 		vcc8-supply = <&vcc3v3_sys>;
 		vcc9-supply = <&vcc5v0_sys>;
 
+		pwrkey {
+			status = "okay";
+		};
+
 		regulators {
 			vdd_logic: DCDC_REG1 {
 				regulator-always-on;

arch/arm64/boot/dts/rockchip/rk3326-863-lp3-v10.dts

@@ -268,6 +268,10 @@
 		vcc8-supply = <&vccsys>;
 		vcc9-supply = <&dcdc_boost>;
 
+		pwrkey {
+			status = "okay";
+		};
+
 		regulators {
 			vdd_logic: DCDC_REG1 {
 				regulator-always-on;

arch/arm64/boot/dts/rockchip/rk3326-evb-lp3-v10.dts

@@ -362,6 +362,10 @@
 		vcc8-supply = <&vccsys>;
 		vcc9-supply = <&dcdc_boost>;
 
+		pwrkey {
+			status = "okay";
+		};
+
 		regulators {
 			vdd_logic: DCDC_REG1 {
 				regulator-always-on;