arm64: dts: rockchip: Add vcc_sys enable pin on rk3399-roc-pc

rk3399-roc-pc has vcc_sys 5V supply for USB and other peripherals.
Add the GPIO pin to enable the regulator.
Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Link: https://lore.kernel.org/r/c72db0ad-c261-af4f-efe6-22bbcf4a0b7b@fivetechno.deSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts

@@ -170,6 +170,10 @@ vcc_vbus_typec1: vcc-vbus-typec1 {
 
 	vcc_sys: vcc-sys {
 		compatible = "regulator-fixed";
+		enable-active-high;
+		gpio = <&gpio2 RK_PA6 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&vcc_sys_en>;
 		regulator-name = "vcc_sys";
 		regulator-always-on;
 		regulator-boot-on;
@@ -598,6 +602,10 @@ vcc5v0_host_en: vcc5v0-host-en {
 			rockchip,pins = <1 RK_PA0 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 
+		vcc_sys_en: vcc-sys-en {
+			rockchip,pins = <2 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
 		hub_rst: hub-rst {
 			rockchip,pins = <2 RK_PA4 RK_FUNC_GPIO &pcfg_output_high>;
 		};