eeprom: digsy_mtc: Convert to use GPIO descriptors

This converts the driver to use GPIO descriptors exclusively
to retrieve GPIO lines. Drop the old GPIO handling in favor of
the core managing it exclusively.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240508184905.2102633-4-andriy.shevchenko@linux.intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>