dt-bindings: gpio: vf610: Allow gpio-line-names to be set

Describe common "gpio-line-names" property to allow DTs to
specify names for GPIO lines.
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240708084107.38986-2-frieder@fris.deSigned-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Documentation/devicetree/bindings/gpio/gpio-vf610.yaml

@@ -51,6 +51,10 @@ properties:
 
   gpio-controller: true
 
+  gpio-line-names:
+    minItems: 1
+    maxItems: 32
+
   clocks:
     items:
       - description: SoC GPIO clock