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

Add Freescale MAG3110 dt-bindings and remove it from trivial-devices
dt-bingding doc.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
[robh: fixup trivial-devices.txt change for trivial-devices.yaml]
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/iio/magnetometer/mag3110.txt

+* 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>;
+};

Documentation/devicetree/bindings/trivial-devices.yaml

@@ -80,8 +80,6 @@ properties:
           - 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