ODROID-M2: dtbo: add watchdog dt overlay

Signed-off-by: YoungSoo Shin <shinys000114@gmail.com>
Change-Id: I4a156665cf5f97eff7980eadcb13bc7659597ae6

arch/arm64/boot/dts/rockchip/overlays/odroidm2/Makefile

@@ -33,6 +33,7 @@ dtbo-y += \
 	uart3.dtbo \
 	uart4.dtbo \
 	uart5.dtbo \
+	wdt.dtbo \
 	weather_board_zero.dtbo
 
 targets += $(dtbo-y)

arch/arm64/boot/dts/rockchip/overlays/odroidm2/wdt.dts

@@ -0,0 +1,12 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+	fragment@0 {
+		target = <&wdt>;
+
+		__overlay__ {
+			status = "okay";
+		};
+	};
+};