ata: sata_gemini: Enable module autoloading

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

Signed-off-by: Liao Chen <liaochen4@huawei.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>