gpiolib: acpi: Switch to use enum in acpi_gpio_in_ignore_list()

gpiolib: acpi: Switch to use enum in acpi_gpio_in_ignore_list()

[ Upstream commit b24fd5bc8e6d6b6006db65b5956c2c2cd0ee5a7b ]

Switch to use enum instead of pointers in acpi_gpio_in_ignore_list()
which moves towards isolating the GPIO ACPI and quirk APIs. It will
helps splitting them completely in the next changes.

No functional changes.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Stable-dep-of: 2d967310c49e ("gpiolib: acpi: Add quirk for Dell Precision 7780")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>