ARM: dts: sun8i: Add watchdog device node for A83T

The A83T, like previous Allwinner SoCs, has a watchdog as part of its
timer block. Add a device node for it.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun8i-a83t.dtsi

@@ -182,6 +182,13 @@ timer@01c20c00 {
 			clocks = <&osc24M>;
 		};
 
+		watchdog@01c20ca0 {
+			compatible = "allwinner,sun6i-a31-wdt";
+			reg = <0x01c20ca0 0x20>;
+			interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&osc24M>;
+		};
+
 		uart0: serial@01c28000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x01c28000 0x400>;