gpio: pch: kerneldoc fixes for excess members

Drop kerneldoc description of 'lock' to fix W=1 warning:

  drivers/gpio/gpio-pch.c:101: warning: Excess struct member 'lock' description in 'pch_gpio'

Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240902121258.64094-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>