dt-bindings: pinctrl: nuvoton,wpcm450-pinctrl: align key node name

gpio-keys schema requires keys to have more generic name.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220616005333.18491-4-krzysztof.kozlowski@linaro.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/nuvoton,wpcm450-pinctrl.yaml

@@ -152,7 +152,7 @@ examples:
       pinctrl-names = "default";
       pinctrl-0 = <&pinctrl_uid>, <&pinmux_uid>;
 
-      uid {
+      button-uid {
         label = "UID";
         linux,code = <102>;
         gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;