ARM: tegra: acer-a500: Add interrupt to temperature sensor node

The TEMP_ALERT pin of LM90 temperature sensor is connected to Tegra SoC.
Add interrupt property to the temperature sensor for completeness.
Signed-off-by: NDmitry Osipenko <digetx@gmail.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra20-acer-a500-picasso.dts

@@ -693,6 +693,10 @@
 			compatible = "onnn,nct1008";
 			reg = <0x4c>;
 			vcc-supply = <&vdd_3v3_sys>;
+
+			interrupt-parent = <&gpio>;
+			interrupts = <TEGRA_GPIO(N, 6) IRQ_TYPE_EDGE_FALLING>;
+
 			#thermal-sensor-cells = <1>;
 		};
 	};