arm: dts: k3-j721e-r5-*.dts: Fix clock-names property in the usb0 instance

In the cdns3 usb driver, the clock name looked for is ref. Therefore, fix
the clock-names property in usb0 instance for proper initialization of
cdns3 usb gadget driver.

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
diff --git a/arch/arm/dts/k3-j721e-r5-common-proc-board.dts b/arch/arm/dts/k3-j721e-r5-common-proc-board.dts
index a12607d..4b2362a 100644
--- a/arch/arm/dts/k3-j721e-r5-common-proc-board.dts
+++ b/arch/arm/dts/k3-j721e-r5-common-proc-board.dts
@@ -280,7 +280,7 @@
 	/delete-property/ assigned-clocks;
 	/delete-property/ assigned-clock-parents;
 	clocks = <&clk_19_2mhz>;
-	clock-names = "usb2_refclk";
+	clock-names = "ref";
 	pinctrl-names = "default";
 	pinctrl-0 = <&main_usbss0_pins_default>;
 	ti,vbus-divider;