arm64: dts: renesas: rcar-gen4: Add interrupt properties to watchdog nodes

Driver doesn't use it yet, but let's describe the HW properly.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20220322095512.4707-6-wsa+renesas@sang-engineering.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a779a0.dtsi

@@ -88,6 +88,7 @@ rwdt: watchdog@e6020000 {
 			compatible = "renesas,r8a779a0-wdt",
 				     "renesas,rcar-gen3-wdt";
 			reg = <0 0xe6020000 0 0x0c>;
+			interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 907>;
 			power-domains = <&sysc R8A779A0_PD_ALWAYS_ON>;
 			resets = <&cpg 907>;

arch/arm64/boot/dts/renesas/r8a779f0.dtsi

@@ -63,6 +63,7 @@ rwdt: watchdog@e6020000 {
 			compatible = "renesas,r8a779f0-wdt",
 				     "renesas,rcar-gen4-wdt";
 			reg = <0 0xe6020000 0 0x0c>;
+			interrupts = <GIC_SPI 515 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 907>;
 			power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
 			resets = <&cpg 907>;