ARM: dts: rockchip: move rk3288 usbphy under the GRF node

The rk3288 usbphy is completely enclosed in the general register files
and the updated binding allows it to be a subnode of the GRF now.
So move the node appropriately.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3288.dtsi

@@ -832,6 +832,37 @@ io_domains: io-domains {
 			compatible = "rockchip,rk3288-io-voltage-domain";
 			status = "disabled";
 		};
+
+		usbphy: usbphy {
+			compatible = "rockchip,rk3288-usb-phy";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+
+			usbphy0: usb-phy@320 {
+				#phy-cells = <0>;
+				reg = <0x320>;
+				clocks = <&cru SCLK_OTGPHY0>;
+				clock-names = "phyclk";
+				#clock-cells = <0>;
+			};
+
+			usbphy1: usb-phy@334 {
+				#phy-cells = <0>;
+				reg = <0x334>;
+				clocks = <&cru SCLK_OTGPHY1>;
+				clock-names = "phyclk";
+				#clock-cells = <0>;
+			};
+
+			usbphy2: usb-phy@348 {
+				#phy-cells = <0>;
+				reg = <0x348>;
+				clocks = <&cru SCLK_OTGPHY2>;
+				clock-names = "phyclk";
+				#clock-cells = <0>;
+			};
+		};
 	};
 
 	wdt: watchdog@ff800000 {
@@ -1085,38 +1116,6 @@ cpu_leakage: cpu_leakage@17 {
 		};
 	};
 
-	usbphy: phy {
-		compatible = "rockchip,rk3288-usb-phy";
-		rockchip,grf = <&grf>;
-		#address-cells = <1>;
-		#size-cells = <0>;
-		status = "disabled";
-
-		usbphy0: usb-phy@320 {
-			#phy-cells = <0>;
-			reg = <0x320>;
-			clocks = <&cru SCLK_OTGPHY0>;
-			clock-names = "phyclk";
-			#clock-cells = <0>;
-		};
-
-		usbphy1: usb-phy@334 {
-			#phy-cells = <0>;
-			reg = <0x334>;
-			clocks = <&cru SCLK_OTGPHY1>;
-			clock-names = "phyclk";
-			#clock-cells = <0>;
-		};
-
-		usbphy2: usb-phy@348 {
-			#phy-cells = <0>;
-			reg = <0x348>;
-			clocks = <&cru SCLK_OTGPHY2>;
-			clock-names = "phyclk";
-			#clock-cells = <0>;
-		};
-	};
-
 	pinctrl: pinctrl {
 		compatible = "rockchip,rk3288-pinctrl";
 		rockchip,grf = <&grf>;