gpiolib: acpi: Remove index parameter from acpi_gpio_property_lookup()

gpiolib: acpi: Remove index parameter from acpi_gpio_property_lookup()

In all cases the supplied index is the same as the passed one in
the struct acpi_gpio_lookup. Remove index parameter and reuse one
from the struct acpi_gpio_lookup instead.

add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-14 (-14)
Function                                     old     new   delta
acpi_get_gpiod_by_index                      462     456      -6
acpi_gpio_property_lookup                    425     417      -8
Total: Before=15375, After=15361, chg -0.09%

Acked-by: Mika Westerberg <westeri@kernel.org>
Link: https://lore.kernel.org/r/20250403160034.2680485-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>