dt-bindings: mfd: adp5585: document reset gpio

Add a reset gpio property. Note that for the adp5585-01 models, the
reset pin is used as the additional ROW5 which means there's no reset.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20250701-dev-adp5589-fw-v7-19-b1fcfe9e9826@analog.com
Signed-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/mfd/adi,adp5585.yaml

@@ -39,6 +39,9 @@ properties:
 
   vdd-supply: true
 
+  reset-gpios:
+    maxItems: 1
+
   gpio-controller: true
 
   '#gpio-cells':
@@ -166,6 +169,7 @@ allOf:
         adi,unlock-events: false
         adi,unlock-trigger-sec: false
         gpio-reserved-ranges: false
+        reset-gpios: false
         adi,keypad-pins:
           minItems: 2
           maxItems: 11