ARM: dts: ux500: Drop drdy pin assignment from magnetometer

This magnetometer can not select which line provided the outgoing
IRQ so drop it, the DT bindings will complain too.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/ste-href-tvk1281618-r3.dtsi

@@ -95,7 +95,6 @@ accelerometer@19 {
 			};
 			magnetometer@1e {
 				compatible = "st,lsm303dlm-magn";
-				st,drdy-int-pin = <1>;
 				reg = <0x1e>;
 				vdd-supply = <&ab8500_ldo_aux1_reg>;
 				vddio-supply = <&db8500_vsmps2_reg>;