arm64: dts: qcom: sdm845: Add APSS watchdog node

Add a node describing the watchdog found in the application subsystem.
Reviewed-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sdm845.dtsi

@@ -3084,6 +3084,12 @@
 			status = "disabled";
 		};
 
+		watchdog@17980000 {
+			compatible = "qcom,apss-wdt-sdm845", "qcom,kpss-wdt";
+			reg = <0 0x17980000 0 0x1000>;
+			clocks = <&sleep_clk>;
+		};
+
 		apss_shared: mailbox@17990000 {
 			compatible = "qcom,sdm845-apss-shared";
 			reg = <0 0x17990000 0 0x1000>;