ARM: dts: vfxxx: Add iio_hwmon node for ADC temperature channel

Add iio-hwmon node to expose the temperature channel on Vybrid as
hardware monitor device using the iio_hwmon driver.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

arch/arm/boot/dts/vfxxx.dtsi

@@ -629,5 +629,10 @@
 				status = "disabled";
 			};
 		};
+
+		iio-hwmon {
+			compatible = "iio-hwmon";
+			io-channels = <&adc0 16>, <&adc1 16>;
+		};
 	};
 };