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Since we have pin configuration getter and setter provided,
there is no need to duplicate that in the custom ->set_config().
Instead, switch to gpiochip_generic_config().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-10-andriy.shevchenko@linux.intel.com

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>