ARM: Kirkwood: Describe DNS325 temperature sensor in DT.

Now that we have I2C support in DT, describe the LM75 in
the DT file for the DNS325.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jamie Lentin <jm@lentin.co.uk>

arch/arm/boot/dts/kirkwood-dns325.dts

@@ -16,6 +16,14 @@
 	};
 
 	ocp@f1000000 {
+		i2c@11000 {
+			status = "okay";
+
+			lm75: lm75@48 {
+				compatible = "national,lm75";
+				reg = <0x48>;
+			};
+		};
 		serial@12000 {
 			clock-frequency = <200000000>;
 			status = "okay";