ARM: dts: socfpga: align interrupt controller node name with dtschema

Fixes dtbs_check warnings like:

  $nodename:0: 'intc@fffed000' does not match '^interrupt-controller(@[0-9a-f,]+)*$'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Dinh Nguyen <dinguyen@kernel.org>
Link: https://lore.kernel.org/r/20220317115705.450427-2-krzysztof.kozlowski@canonical.com

arch/arm/boot/dts/socfpga.dtsi

@@ -46,7 +46,7 @@ pmu: pmu@ff111000 {
 		      <0xff113000 0x1000>;
 	};
 
-	intc: intc@fffed000 {
+	intc: interrupt-controller@fffed000 {
 		compatible = "arm,cortex-a9-gic";
 		#interrupt-cells = <3>;
 		interrupt-controller;

arch/arm/boot/dts/socfpga_arria10.dtsi

@@ -38,7 +38,7 @@ pmu: pmu@ff111000 {
 		      <0xff113000 0x1000>;
 	};
 
-	intc: intc@ffffd000 {
+	intc: interrupt-controller@ffffd000 {
 		compatible = "arm,cortex-a9-gic";
 		#interrupt-cells = <3>;
 		interrupt-controller;