dt-bindings: iio: magnetometer: add dt-bindings for freescale mag3110

* FREESCALE MAG3110 magnetometer sensor

Required properties:

  - compatible : should be "fsl,mag3110"

  - reg : the I2C address of the magnetometer

Optional properties:

  - interrupts: the sole interrupt generated by the device

  Refer to interrupt-controller/interrupts.txt for generic interrupt client

  node bindings.

  - vdd-supply: phandle to the regulator that provides power to the sensor.

  - vddio-supply: phandle to the regulator that provides power to the sensor's IO.

Example:

magnetometer@e {

	compatible = "fsl,mag3110";

	reg = <0x0e>;

	pinctrl-names = "default";

	pinctrl-0 = <&pinctrl_i2c3_mag3110_int>;

	interrupt-parent = <&gpio3>;

	interrupts = <16 IRQ_TYPE_EDGE_RISING>;

};

          - domintech,dmard09

            # DMARD10: 3-axis Accelerometer

          - domintech,dmard10

            # MAG3110: Xtrinsic High Accuracy, 3D Magnetometer

          - fsl,mag3110

            # MMA7660FC: 3-Axis Orientation/Motion Detection Sensor

          - fsl,mma7660

            # MMA8450Q: Xtrinsic Low-power, 3-axis Xtrinsic Accelerometer