arm64: dts: renesas: r8a774b1: Add INTC-EX device node

Add support for the Interrupt Controller for External Devices
(INTC-EX) on RZ/G2N.
Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Link: https://lore.kernel.org/r/1570531132-21856-11-git-send-email-fabrizio.castro@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a774b1.dtsi

@@ -390,6 +390,22 @@ tsc: thermal@e6198000 {
 			#thermal-sensor-cells = <1>;
 		};
 
+		intc_ex: interrupt-controller@e61c0000 {
+			compatible = "renesas,intc-ex-r8a774b1", "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
+				      GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH
+				      GIC_SPI 161 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 407>;
+			power-domains = <&sysc R8A774B1_PD_ALWAYS_ON>;
+			resets = <&cpg 407>;
+		};
+
 		tmu0: timer@e61e0000 {
 			compatible = "renesas,tmu-r8a774b1", "renesas,tmu";
 			reg = <0 0xe61e0000 0 0x30>;