ARM: dts: keystone-k2g: add watchdog support

Add a watchdog node for keystone-k2g, with the corresponding clock and
power domain handles.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/keystone-k2g.dtsi

@@ -596,5 +596,12 @@ spi3: spi@21806000 {
 			power-domains = <&k2g_pds 0x0013>;
 			clocks = <&k2g_clks 0x0013 0>;
 		};
+
+		wdt: wdt@02250000 {
+			compatible = "ti,keystone-wdt", "ti,davinci-wdt";
+			reg = <0x02250000 0x80>;
+			power-domains = <&k2g_pds 0x22>;
+			clocks = <&k2g_clks 0x22 0>;
+		};
 	};
 };