Add a function to write a GPIO descriptor to the generated ACPI code.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NWolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
[bmeng: Drop comment about the type always being ACPI_GPIO_TYPE_IO]
Signed-off-by: NBin Meng <bmeng.cn@gmail.com>