arm64: dts: ti: k3-am62a: Make the main_conf node a simple-bus

The main_conf node does not need to be a syscon, so change to
"simple-bus". This removes a DTS check warning.

Signed-off-by: Andrew Davis <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vignesh Raghavendra <[e-mail]>

arch/arm64/boot/dts/ti/k3-am62a-main.dtsi

···
 		};
 	};
 
-	main_conf: syscon@100000 {
-		compatible = "ti,j721e-system-controller", "syscon", "simple-mfd";
-		reg = <0x00 0x00100000 0x00 0x20000>;
+	main_conf: bus@100000 {
+		compatible = "simple-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x00 0x00 0x00100000 0x20000>;