dt-bindings:iio:magnetometer:pni,rm3100: txt to yaml conversion.

Simple binding format conversion.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Song Qiang <songqiang1304521@gmail.com>
Link: https://lore.kernel.org/r/20201031184854.745828-28-jic23@kernel.org

Documentation/devicetree/bindings/iio/magnetometer/pni,rm3100.txt

-* PNI RM3100 3-axis magnetometer sensor
-
-Required properties:
-
-- compatible : should be "pni,rm3100"
-- reg : the I2C address or SPI chip select number of the sensor.
-
-Optional properties:
-
-- interrupts: data ready (DRDY) from the chip.
-  The interrupts can be triggered on level high.
-
-Example:
-
-rm3100: rm3100@20 {
-	compatible = "pni,rm3100";
-	reg = <0x20>;
-	interrupt-parent = <&gpio0>;
-	interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
-};

Documentation/devicetree/bindings/iio/magnetometer/pni,rm3100.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/magnetometer/pni,rm3100.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PNI RM3100 3-axis magnetometer sensor
+
+maintainers:
+  - Song Qiang <songqiang1304521@gmail.com>
+
+properties:
+  compatible:
+    const: pni,rm3100
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        magnetometer@20 {
+            compatible = "pni,rm3100";
+            reg = <0x20>;
+            interrupt-parent = <&gpio0>;
+            interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
+        };
+    };
+...