dt-bindings: iio: chemical: add ENS160 sensor

Add bindings for ScioSense ENS160 multi-gas sensor.

Datasheet: https://www.sciosense.com/wp-content/uploads/2023/12/ENS160-Datasheet.pdfReviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Gustavo Silva <gustavograzs@gmail.com>
Link: https://lore.kernel.org/r/20240604225747.7212-3-gustavograzs@gmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/chemical/sciosense,ens160.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/chemical/sciosense,ens160.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ScioSense ENS160 multi-gas sensor
+
+maintainers:
+  - Gustavo Silva <gustavograzs@gmail.com>
+
+description: |
+  Digital Multi-Gas Sensor for Monitoring Indoor Air Quality.
+
+  Datasheet:
+    https://www.sciosense.com/wp-content/uploads/2023/12/ENS160-Datasheet.pdf
+
+properties:
+  compatible:
+    enum:
+      - sciosense,ens160
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vdd-supply: true
+  vddio-supply: true
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      gas-sensor@52 {
+        compatible = "sciosense,ens160";
+        reg = <0x52>;
+        interrupt-parent = <&gpio0>;
+        interrupts = <19 IRQ_TYPE_EDGE_FALLING>;
+      };
+    };
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      gas-sensor@0 {
+        compatible = "sciosense,ens160";
+        reg = <0>;
+        spi-max-frequency = <10000000>;
+        interrupt-parent = <&gpio>;
+        interrupts = <19 IRQ_TYPE_EDGE_FALLING>;
+      };
+    };
+
+...