ARM: dts: bcmbca: bcm63178: clean up psci node

Remove unnecessary cpu_on and cpu_off properties from psci
node as they are only needed for psci version prior to 0.2.

Fixes: fc85b7e6 ("ARM: dts: add dts files for bcmbca soc 63178")
Signed-off-by: William Zhang <william.zhang@broadcom.com>
Link: https://lore.kernel.org/r/20220801194448.29363-2-william.zhang@broadcom.comSigned-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm63178.dtsi

@@ -80,8 +80,6 @@ uart_clk: uart-clk {
 	psci {
 		compatible = "arm,psci-0.2";
 		method = "smc";
-		cpu_off = <1>;
-		cpu_on = <2>;
 	};
 
 	axi@81000000 {