lantiq: dts: Move the &usb_vbus nodes out of &gpio

Move the USB VBUS regulator nodes out of the GPIO controller node. This
fixes a problem where the "regulator-fixed" driver wasn't probed for
these regulators because the GPIO driver doesn't scan the child-nodes
and based on the dt-bindings documentation it's not supposed to.

This fixed the following error reported by Luca Olivetti:
  ...
  dwc2 1e101000.usb: DWC OTG Controller
  dwc2 1e101000.usb: new USB bus registered, assigned bus number 1
  dwc2 1e101000.usb: irq 62, io mem 0x1e101000
  dwc2 1e101000.usb: startup error -517
  dwc2 1e101000.usb: USB bus 1 deregistered
  dwc2 1e101000.usb: dwc2_hcd_init() FAILED, returning -517

Fixes: FS#1634
Cc: Luca Olivetti <luca@ventoso.org>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
[backported from 982468de35d499f85470b7b547d2b27cea53bae0]
Signed-off-by: Luca Olivetti <luca@ventoso.org>

target/linux/lantiq/files-4.14/arch/mips/boot/dts/ARV7510PW22.dts

@@ -74,6 +74,18 @@
 			gpios = <&gpio 20 GPIO_ACTIVE_LOW>;
 		};
 	};
+
+	usb_vbus: regulator-usb-vbus {
+		compatible = "regulator-fixed";
+
+		regulator-name = "USB_VBUS";
+
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+
+		gpio = <&gpio 8 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
 };
 
 &gpio {
@@ -115,18 +127,6 @@
 			lantiq,output = <0>;
 		};
 	};
-
-	usb_vbus: regulator-usb-vbus {
-		compatible = "regulator-fixed";
-
-		regulator-name = "USB_VBUS";
-
-		regulator-min-microvolt = <5000000>;
-		regulator-max-microvolt = <5000000>;
-
-		gpio = <&gpio 8 GPIO_ACTIVE_HIGH>;
-		enable-active-high;
-	};
 };
 
 &gsw {

target/linux/lantiq/files-4.14/arch/mips/boot/dts/ARV7518PW.dts

@@ -106,6 +106,18 @@
 			gpios = <&gpiomm 6 GPIO_ACTIVE_LOW>;
 		};
 	};
+
+	usb_vbus: regulator-usb-vbus {
+		compatible = "regulator-fixed";
+
+		regulator-name = "USB_VBUS";
+
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+
+		gpio = <&gpio 14 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
 };
 
 &gpio {
@@ -146,18 +158,6 @@
 			lantiq,open-drain = <1>;
 		};
 	};
-
-	usb_vbus: regulator-usb-vbus {
-		compatible = "regulator-fixed";
-
-		regulator-name = "USB_VBUS";
-
-		regulator-min-microvolt = <5000000>;
-		regulator-max-microvolt = <5000000>;
-
-		gpio = <&gpio 14 GPIO_ACTIVE_HIGH>;
-		enable-active-high;
-	};
 };
 
 &gpiomm {

target/linux/lantiq/files-4.14/arch/mips/boot/dts/ARV752DPW.dts

@@ -107,6 +107,18 @@
 			gpios = <&gpiomm 9 GPIO_ACTIVE_LOW>;
 		};
 	};
+
+	usb_vbus: regulator-usb-vbus {
+		compatible = "regulator-fixed";
+
+		regulator-name = "USB_VBUS";
+
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+
+		gpio = <&gpiomm 0 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
 };
 
 &gpio {
@@ -153,18 +165,6 @@
 			lantiq,open-drain = <1>;
 		};
 	};
-
-	usb_vbus: regulator-usb-vbus {
-		compatible = "regulator-fixed";
-
-		regulator-name = "USB_VBUS";
-
-		regulator-min-microvolt = <5000000>;
-		regulator-max-microvolt = <5000000>;
-
-		gpio = <&gpiomm 0 GPIO_ACTIVE_HIGH>;
-		enable-active-high;
-	};
 };
 
 &gpiomm {

target/linux/lantiq/files-4.14/arch/mips/boot/dts/P2601HNFX.dts

@@ -97,6 +97,18 @@
 			gpios = <&gpio 50 GPIO_ACTIVE_HIGH>;
 		};
 	};
+
+	usb_vbus: regulator-usb-vbus {
+		compatible = "regulator-fixed";
+
+		regulator-name = "USB_VBUS";
+
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+
+		gpio = <&gpio 9 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
 };
 
 &gpio {
@@ -129,18 +141,6 @@
 			lantiq,function = "mdio";
 		};
 	};
-
-	usb_vbus: regulator-usb-vbus {
-		compatible = "regulator-fixed";
-
-		regulator-name = "USB_VBUS";
-
-		regulator-min-microvolt = <5000000>;
-		regulator-max-microvolt = <5000000>;
-
-		gpio = <&gpio 9 GPIO_ACTIVE_HIGH>;
-		enable-active-high;
-	};
 };
 
 &gsw {