dt-bindings: iio: pressure: Add Sensirion SDP500

Sensirion SDP500 is a digital differential pressure sensor. It provides
a digital I2C output. Add devicetree bindings requiring the compatible
string and I2C slave address (reg).
Signed-off-by: Petar Stoykov <pd.pstoykov@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://patch.msgid.link/20240725-mainline_sdp500-v4-1-ea2f5b189958@gmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/pressure/sensirion,sdp500.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/pressure/sensirion,sdp500.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: sdp500/sdp510 pressure sensor with I2C bus interface
+
+maintainers:
+  - Petar Stoykov <petar.stoykov@prodrive-technologies.com>
+
+description: |
+  Pressure sensor from Sensirion with I2C bus interface.
+  There is no software difference between sdp500 and sdp510.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - const: sensirion,sdp510
+          - const: sensirion,sdp500
+      - const: sensirion,sdp500
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      pressure@40 {
+        compatible = "sensirion,sdp500";
+        reg = <0x40>;
+        vdd-supply = <&foo>;
+      };
+    };