arm64: dts: r8a7796/salvator-x: Enable watchdog timer

Enable the Watchdog Timer (WDT) controller on the Renesas Salvator-X
board equipped with an R-Car M3-W (r8a7796) SoC.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts

@@ -43,3 +43,8 @@ &scif_clk {
 	clock-frequency = <14745600>;
 	status = "okay";
 };
+
+&wdt0 {
+	timeout-sec = <60>;
+	status = "okay";
+};