ARM: dts: r8a7742: Add IRQC support

Describe the IRQC interrupt controller in the r8a7742 device tree.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1588794695-27852-4-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm/boot/dts/r8a7742.dtsi

@@ -226,6 +226,20 @@ sysc: system-controller@e6180000 {
 			#power-domain-cells = <1>;
 		};
 
+		irqc: interrupt-controller@e61c0000 {
+			compatible = "renesas,irqc-r8a7742", "renesas,irqc";
+			#interrupt-cells = <2>;
+			interrupt-controller;
+			reg = <0 0xe61c0000 0 0x200>;
+			interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 407>;
+			power-domains = <&sysc R8A7742_PD_ALWAYS_ON>;
+			resets = <&cpg 407>;
+		};
+
 		icram0: sram@e63a0000 {
 			compatible = "mmio-sram";
 			reg = <0 0xe63a0000 0 0x12000>;