arm64: dts: ti: k3-j7200-common-proc-board: Remove clock-frequency from mcu_uart0

Clock-frequency property is already present in mcu_uart0 node of the
k3-j7200-mcu-wakeup.dtsi file. Thus, remove redundant clock-frequency
property from mcu_uart0 node.

Fixes: 3709ea7f ("arm64: dts: ti: k3-j7200-common-proc-board: Add uart pinmux")
Signed-off-by: Bhavya Kapoor <b-kapoor@ti.com>
Link: https://lore.kernel.org/r/20240214105846.1096733-3-b-kapoor@ti.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts

@@ -273,7 +273,6 @@ &mcu_uart0 {
 	status = "okay";
 	pinctrl-names = "default";
 	pinctrl-0 = <&mcu_uart0_pins_default>;
-	clock-frequency = <96000000>;
 };
 
 &main_uart0 {