dt-bindings: iio: adc: ad7380: add adaq4381-4 compatible parts

adaq4381-4 is the 14 bits version of adaq4380-1 chip. Add support for
it.

Signed-off-by: Julien Stephan <jstephan@baylibre.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250226-ad7380-add-adaq4381-4-support-v1-2-f350ab872d37@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml

@@ -27,6 +27,7 @@ description: |
   * https://www.analog.com/en/products/ad7388-4.html
   * https://www.analog.com/en/products/adaq4370-4.html
   * https://www.analog.com/en/products/adaq4380-4.html
+  * https://www.analog.com/en/products/adaq4381-4.html
 
 
 $ref: /schemas/spi/spi-peripheral-props.yaml#
@@ -50,6 +51,7 @@ properties:
       - adi,ad7388-4
       - adi,adaq4370-4
       - adi,adaq4380-4
+      - adi,adaq4381-4
 
   reg:
     maxItems: 1
@@ -201,6 +203,7 @@ allOf:
             - adi,ad7380-4
             - adi,adaq4370-4
             - adi,adaq4380-4
+            - adi,adaq4381-4
     then:
       properties:
         refio-supply: false
@@ -218,6 +221,7 @@ allOf:
           enum:
             - adi,adaq4370-4
             - adi,adaq4380-4
+            - adi,adaq4381-4
     then:
       required:
         - vs-p-supply