input: gpio_keys_polled: Add support for GPIO descriptors

input: gpio_keys_polled: Add support for GPIO descriptors

GPIO descriptors are the preferred way over legacy GPIO numbers
nowadays. Convert the driver to use GPIO descriptors internally but
still allow passing legacy GPIO numbers from platform data to support
existing platforms.

Signed-off-by: Aaron Lu <[email protected]>
Signed-off-by: Mika Westerberg <[email protected]>
Acked-by: Alexandre Courbot <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Acked-by: Dmitry Torokhov <[email protected]>
Acked-by: Grant Likely <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>