ARM: tegra: harmony: Add ADT7641 temperature sensor

The Harmony board has an Analog Devices ADT7461 temperature sensor
connected to the DVC bus. It can be used to monitor the ambient (local)
and on-die (remote) temperatures.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/boot/dts/tegra20-harmony.dts

@@ -396,6 +396,11 @@ ldo_rtc {
 				};
 			};
 		};
+
+		temperature-sensor@4c {
+			compatible = "adi,adt7461";
+			reg = <0x4c>;
+		};
 	};
 
 	pmc {