ARM: tegra: colibri_t20: annotate/rename lm95245 temperature sensor

Rename and annotate LM95245 temperature sensor more in-line with our
other device trees.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra20-colibri.dtsi

@@ -584,7 +584,8 @@ ldo_rtc {
 			};
 		};
 
-		temperature-sensor@4c {
+		/* LM95245 temperature sensor */
+		temp-sensor@4c {
 			compatible = "national,lm95245";
 			reg = <0x4c>;
 		};