dt-bindings:iio:light:avago,apds9300: txt to yaml conversion.

This could have gone in trivial-devices.yaml, but there was a datasheet
link so I've given it a minimal file of it's own.
Very simple binding and so a very simple conversion.

Oleksandr's email address is bouncing so I've put myself as fallback
maintainer until someone else steps forward.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201031184854.745828-14-jic23@kernel.org

Documentation/devicetree/bindings/iio/light/apds9300.txt

-* Avago APDS9300 ambient light sensor
-
-https://www.avagotech.com/docs/AV02-1077EN
-
-Required properties:
-
-  - compatible : should be "avago,apds9300"
-  - reg : the I2C address of the sensor
-
-Optional properties:
-
-  - interrupts : interrupt mapping for GPIO IRQ
-
-Example:
-
-apds9300@39 {
-	compatible = "avago,apds9300";
-	reg = <0x39>;
-	interrupt-parent = <&gpio2>;
-	interrupts = <29 8>;
-};

Documentation/devicetree/bindings/iio/light/avago,apds9300.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/avago,apds9300.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Avago APDS9300 ambient light sensor
+
+maintainers:
+  - Jonathan Cameron <jic23@kernel.org>
+
+description: |
+  Datasheet at https://www.avagotech.com/docs/AV02-1077EN
+
+properties:
+  compatible:
+    const: avago,apds9300
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        light-sensor@39 {
+            compatible = "avago,apds9300";
+            reg = <0x39>;
+            interrupt-parent = <&gpio2>;
+            interrupts = <29 8>;
+        };
+    };
+...