dt-bindings: iio: adc: Add AXP717 compatible

Add compatible binding for the axp717.

Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Link: https://patch.msgid.link/20240821215456.962564-9-macroalpha82@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/adc/x-powers,axp209-adc.yaml

@@ -37,6 +37,17 @@ description: |
    3 | batt_dischrg_i
    4 | ts_v
 
+  AXP717
+  ------
+   0 | batt_v
+   1 | ts_v
+   2 | vbus_v
+   3 | vsys_v
+   4 | pmic_temp
+   5 | batt_chrg_i
+   6 | vmid_v
+   7 | bkup_batt_v
+
   AXP813
   ------
    0 | pmic_temp
@@ -52,6 +63,7 @@ properties:
     oneOf:
       - const: x-powers,axp209-adc
       - const: x-powers,axp221-adc
+      - const: x-powers,axp717-adc
       - const: x-powers,axp813-adc
 
       - items: