arm64: dts: apm: Add X-Gene SoC hwmon to device tree

This patch adds DT node to enable hwmon driver for APM X-Gene SoC.
Signed-off-by: Hoan Tran <hotran@apm.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>

arch/arm64/boot/dts/apm/apm-shadowcat.dtsi

@@ -530,6 +530,11 @@ i2cslimpro {
 			mboxes = <&mailbox 0>;
 		};
 
+		hwmonslimpro {
+			compatible = "apm,xgene-slimpro-hwmon";
+			mboxes = <&mailbox 7>;
+		};
+
 		serial0: serial@10600000 {
 			device_type = "serial";
 			compatible = "ns16550";

arch/arm64/boot/dts/apm/apm-storm.dtsi

@@ -755,6 +755,11 @@ i2cslimpro {
 			mboxes = <&mailbox 0>;
 		};
 
+		hwmonslimpro {
+			compatible = "apm,xgene-slimpro-hwmon";
+			mboxes = <&mailbox 7>;
+		};
+
 		serial0: serial@1c020000 {
 			status = "disabled";
 			device_type = "serial";