arm64: dts: imx8mm: Move usbphy out of soc node

usbphy nodes do not have any register properties and thus
shouldn't be placed inside the bus.

Move usbphy nodes from soc node to root node in order to fix
the following build warnings with W=1:

arch/arm64/boot/dts/freescale/imx8mm.dtsi:681.27-687.6: Warning (simple_bus_reg): /soc/bus@32c00000/usbphynop1: missing or empty reg/ranges property
arch/arm64/boot/dts/freescale/imx8mm.dtsi:710.27-716.6: Warning (simple_bus_reg): /soc/bus@32c00000/usbphynop2: missing or empty reg/ranges property
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm.dtsi

@@ -200,6 +200,22 @@ timer {
 		arm,no-tick-in-suspend;
 	};
 
+	usbphynop1: usbphynop1 {
+		compatible = "usb-nop-xceiv";
+		clocks = <&clk IMX8MM_CLK_USB_PHY_REF>;
+		assigned-clocks = <&clk IMX8MM_CLK_USB_PHY_REF>;
+		assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_100M>;
+		clock-names = "main_clk";
+	};
+
+	usbphynop2: usbphynop2 {
+		compatible = "usb-nop-xceiv";
+		clocks = <&clk IMX8MM_CLK_USB_PHY_REF>;
+		assigned-clocks = <&clk IMX8MM_CLK_USB_PHY_REF>;
+		assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_100M>;
+		clock-names = "main_clk";
+	};
+
 	soc@0 {
 		compatible = "simple-bus";
 		#address-cells = <1>;
@@ -737,14 +753,6 @@ usbotg1: usb@32e40000 {
 				status = "disabled";
 			};
 
-			usbphynop1: usbphynop1 {
-				compatible = "usb-nop-xceiv";
-				clocks = <&clk IMX8MM_CLK_USB_PHY_REF>;
-				assigned-clocks = <&clk IMX8MM_CLK_USB_PHY_REF>;
-				assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_100M>;
-				clock-names = "main_clk";
-			};
-
 			usbmisc1: usbmisc@32e40200 {
 				compatible = "fsl,imx8mm-usbmisc", "fsl,imx7d-usbmisc";
 				#index-cells = <1>;
@@ -766,14 +774,6 @@ usbotg2: usb@32e50000 {
 				status = "disabled";
 			};
 
-			usbphynop2: usbphynop2 {
-				compatible = "usb-nop-xceiv";
-				clocks = <&clk IMX8MM_CLK_USB_PHY_REF>;
-				assigned-clocks = <&clk IMX8MM_CLK_USB_PHY_REF>;
-				assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_100M>;
-				clock-names = "main_clk";
-			};
-
 			usbmisc2: usbmisc@32e50200 {
 				compatible = "fsl,imx8mm-usbmisc", "fsl,imx7d-usbmisc";
 				#index-cells = <1>;