ARM: at91/dt: sama5d2: add watchdog node

Add watchdog node to support SAMA5D4 watchdog.

Signed-off-by: Wenyou Yang <[e-mail]>
Signed-off-by: Nicolas Ferre <[e-mail]>

arch/arm/boot/dts/at91-sama5d2_xplained.dts

···
 				};
 			};
 
+			watchdog@f8048040 {
+				status = "okay";
+			};
+
 			uart3: serial@fc008000 {
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_uart3_default>;

arch/arm/boot/dts/sama5d2.dtsi

···
 				clocks = <&h32ck>;
 			};
 
+			watchdog@f8048040 {
+				compatible = "atmel,sama5d4-wdt";
+				reg = <0xf8048040 0x10>;
+				interrupts = <4 IRQ_TYPE_LEVEL_HIGH 7>;
+				status = "disabled";
+			};
+
 			sckc@f8048050 {
 				compatible = "atmel,at91sam9x5-sckc";
 				reg = <0xf8048050 0x4>;