ARM: dts: imx53-ppd: Rename usbphy nodes

This renames usbphy nodes 2 & 3, so that they follow the same
format as usbphy node 0 & 1 from imx53.dtsi.

Signed-off-by: Sebastian Reichel <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx53-ppd.dts

···
 		};
 	};
 
-	usbphy2: usbphy2 {
+	usbphy2: usbphy-2 {
 		compatible = "usb-nop-xceiv";
 		vcc-supply = <&reg_3v3>;
 		reset-gpios = <&gpio4 4 GPIO_ACTIVE_LOW>;
···
 		assigned-clock-parents = <&clks IMX5_CLK_OSC>;
 	};
 
-	usbphy3: usbphy3 {
+	usbphy3: usbphy-3 {
 		compatible = "usb-nop-xceiv";
 		vcc-supply = <&reg_3v3>;
 		reset-gpios = <&gpio2 19 GPIO_ACTIVE_LOW>;