dt-bindings: iio: humidity: add ENS210 sensor family

Add device tree documentation for ENS210 family of temperature and
humidity sensors
Signed-off-by: Joshua Felmeden <jfelmeden@thegoodpenguin.co.uk>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20240805-ens21x-v6-1-5bb576ef26a6@thegoodpenguin.co.ukSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/humidity/sciosense,ens210.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/humidity/sciosense,ens210.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ScioSense ENS210 temperature and humidity sensor
+
+maintainers:
+  - Joshua Felmeden <jfelmeden@thegoodpenguin.co.uk>
+
+description: |
+  Temperature and Humidity sensor.
+
+  Datasheet:
+    https://www.sciosense.com/wp-content/uploads/2024/04/ENS21x-Datasheet.pdf
+    https://www.sciosense.com/wp-content/uploads/2023/12/ENS210-Datasheet.pdf
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - sciosense,ens210a
+              - sciosense,ens211
+              - sciosense,ens212
+              - sciosense,ens213a
+              - sciosense,ens215
+          - const: sciosense,ens210
+      - const: sciosense,ens210
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+       #address-cells = <1>;
+       #size-cells = <0>;
+
+       temperature-sensor@43 {
+           compatible = "sciosense,ens210";
+           reg = <0x43>;
+       };
+    };
+...
+