dt-bindings: iio: ad74413r: add optional reset-gpios

The ad74412 and ad74413 devices have an active-low reset pin. Add a
binding allowing one to specify a gpio tied to that.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221115095517.1008632-3-linux@rasmusvillemoes.dkSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/addac/adi,ad74413r.yaml

@@ -51,6 +51,9 @@ properties:
       Shunt (sense) resistor value in micro-Ohms.
     default: 100000000
 
+  reset-gpios:
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -129,6 +132,7 @@ examples:
         interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
 
         refin-supply = <&ad74413r_refin>;
+        reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>;
 
         channel@0 {
           reg = <0>;