rockchip: dts: rk3328: add fixed regulator node for xhci

The driver changes gpio to fixed regulator to control vbus, so add
fixed regulator node in DTS for xhci driver.

Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

arch/arm/dts/rk3328-evb.dts

@@ -14,6 +14,15 @@
 	chosen {
 		stdout-path = &uart2;
 	};
+
+	vcc5v0_host_xhci: vcc5v0-host-xhci-drv {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		regulator-name = "vcc5v0_host_xhci";
+		gpio = <&gpio0 0 GPIO_ACTIVE_HIGH>;
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+	};
 };
 
 &uart2 {
@@ -53,6 +62,6 @@
 };
 
 &usb_host0_xhci {
-	rockchip,vbus-gpio = <&gpio0 0 GPIO_ACTIVE_HIGH>;
+	vbus-supply = <&vcc5v0_host_xhci>;
 	status = "okay";
 };