ARM: dts: imx27 phyCARD-S SOM remove wrong i2c sensor

This sensor was introduced in the original pca100 board file, but
phyCARD-S SOM and RDK do not have a temperature sensor.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx27-phytec-phycard-s-som.dts

@@ -50,11 +50,6 @@ rtc@51 {
 &i2c2 {
 	status = "okay";
 
-	lm75@4a {
-		compatible = "national,lm75";
-		reg = <0x4a>;
-	};
-
 	at24@52 {
 		compatible = "at,24c32";
 		pagesize = <32>;