arm64: dts: imx8mm/n remove clock-names property from usb controller node

The clock-names property is not needed by usb controller node on imx8mm/n.
This will remove it.
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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

@@ -1260,7 +1260,6 @@ usbotg1: usb@32e40000 {
 				reg = <0x32e40000 0x200>;
 				interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&clk IMX8MM_CLK_USB1_CTRL_ROOT>;
-				clock-names = "usb1_ctrl_root_clk";
 				assigned-clocks = <&clk IMX8MM_CLK_USB_BUS>;
 				assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_500M>;
 				phys = <&usbphynop1>;
@@ -1281,7 +1280,6 @@ usbotg2: usb@32e50000 {
 				reg = <0x32e50000 0x200>;
 				interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&clk IMX8MM_CLK_USB1_CTRL_ROOT>;
-				clock-names = "usb1_ctrl_root_clk";
 				assigned-clocks = <&clk IMX8MM_CLK_USB_BUS>;
 				assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_500M>;
 				phys = <&usbphynop2>;

arch/arm64/boot/dts/freescale/imx8mn.dtsi

@@ -1220,7 +1220,6 @@ usbotg1: usb@32e40000 {
 				reg = <0x32e40000 0x200>;
 				interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&clk IMX8MN_CLK_USB1_CTRL_ROOT>;
-				clock-names = "usb1_ctrl_root_clk";
 				assigned-clocks = <&clk IMX8MN_CLK_USB_BUS>;
 				assigned-clock-parents = <&clk IMX8MN_SYS_PLL2_500M>;
 				phys = <&usbphynop1>;