rockchip: dts: rk3399-puma: replace 'rockchip, vbus-gpio' with fixed regulator

On the RK3399-Q7, we need to turn on the on-module USB hub before using the
USB host interfaces (only the OTG interface is directly connected to the edge
connector).  This drops the deprecated 'rockchip,vbus-gpio' property and uses
a fixed regulator to turn on the USB hub.

References: 26a8b80 "usb: host: xhci-rockchip: use fixed regulator to control vbus"
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/rk3399-puma.dtsi

@@ -89,6 +89,17 @@
 		};
 	};
 
+	usbhub_enable: usbhub_enable {
+		compatible = "regulator-fixed";
+		regulator-name = "usbhub_enable";
+		enable-active-low;
+		gpio = <&gpio4 3 GPIO_ACTIVE_HIGH>;
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
 	vccadc_ref: vccadc-ref {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc1v8_sys";
@@ -514,7 +525,6 @@
 };
 
 &dwc3_typec1 {
-	rockchip,vbus-gpio = <&gpio4 3 GPIO_ACTIVE_LOW>;
 	status = "okay";
 };