ARM: dts: imx6ul-14x14-evk: Fix the magnetometer node name

Node name is supposed to be generic, use "magnetometer" instead
of "mag3110" for magnetometer node.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6ul-14x14-evk.dtsi

@@ -190,7 +190,7 @@ &i2c1 {
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
 
-	mag3110@e {
+	magnetometer@e {
 		compatible = "fsl,mag3110";
 		reg = <0x0e>;
 	};