dt-bindings: pinctrl: qcom,sc8280xp-lpass-lpi: fix gpio pattern

Fix double ']' in GPIO pattern to properly match "pins" property.
Otherwise schema for pins state fails.

Fixes: 958bb025 ("dt-bindings: pinctrl: qcom: Add sc8280xp lpass lpi pinctrl bindings")
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220927153429.55365-6-krzysztof.kozlowski@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>