arm64: dts: qcom: Add APSS shared mailbox node to SDM845

This patch add the node to support APSS shared
mailbox on SDM845
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

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

@@ -272,5 +272,11 @@ spmi_bus: spmi@c440000 {
 			#interrupt-cells = <4>;
 			cell-index = <0>;
 		};
+
+		apss_shared: mailbox@17990000 {
+			compatible = "qcom,sdm845-apss-shared";
+			reg = <0x17990000 0x1000>;
+			#mbox-cells = <1>;
+		};
 	};
 };