gpio: modepin: Enable module autoloading

Add MODULE_DEVICE_TABLE(), so modules could be properly autoloaded based
on the alias from of_device_id table.

Fixes: 7687a5b0 ("gpio: modepin: Add driver support for modepin GPIO controller")
Signed-off-by: Liao Chen <liaochen4@huawei.com>
Reviewed-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20240902115848.904227-1-liaochen4@huawei.com


Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>