gpiolib: acpi: Take into account debounce settings

We didn't take into account the debounce settings supplied by ACPI.
This change is targeting the mentioned gap.

Reported-by: Coiby Xu <coiby.xu@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>