ARM: dts: r8a7742: Add RWDT node

Add a device node for the Watchdog Timer (RWDT) controller on the Renesas
RZ/G1H (r8a7742) SoC.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/1590172641-1556-1-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm/boot/dts/r8a7742.dtsi

@@ -201,6 +201,17 @@ soc {
 		#size-cells = <2>;
 		ranges;
 
+		rwdt: watchdog@e6020000 {
+			compatible = "renesas,r8a7742-wdt",
+				     "renesas,rcar-gen2-wdt";
+			reg = <0 0xe6020000 0 0x0c>;
+			interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 402>;
+			power-domains = <&sysc R8A7742_PD_ALWAYS_ON>;
+			resets = <&cpg 402>;
+			status = "disabled";
+		};
+
 		gpio0: gpio@e6050000 {
 			compatible = "renesas,gpio-r8a7742",
 				     "renesas,rcar-gen2-gpio";