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of_gpio.h is deprecated and subject to remove.
The driver doesn't use it, simply remove the unused header.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240307114600.3643948-1-andriy.shevchenko@linux.intel.com

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>