ARM: dts: bcm2837/bcm2712: adjust local intc node names

After converting the bcm2836-l1-intc DT binding to YAML, the DT schema
checks gave warnings like:

'local_intc@40000000' does not match '^interrupt-controller(@[0-9a-f,]+)*$'

So fix them accordingly.

Signed-off-by: Stefan Wahren <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Florian Fainelli <[e-mail]>

arch/arm/boot/dts/broadcom/bcm2837.dtsi

···
 			 <0x40000000 0x40000000 0x00001000>;
 		dma-ranges = <0xc0000000 0x00000000 0x3f000000>;
 
-		local_intc: local_intc@40000000 {
+		local_intc: interrupt-controller@40000000 {
 			compatible = "brcm,bcm2836-l1-intc";
 			reg = <0x40000000 0x100>;
 			interrupt-controller;

arch/arm64/boot/dts/broadcom/bcm2712.dtsi

···
 			#mbox-cells = <0>;
 		};
 
-		local_intc: local-intc@7cd00000 {
+		local_intc: interrupt-controller@7cd00000 {
 			compatible = "brcm,bcm2836-l1-intc";
 			reg = <0x7cd00000 0x100>;
 		};