extcon: axp288: Add a depends on ACPI to the Kconfig entry

As Hans de Goede pointed, using this driver without ACPI
makes little sense, so add ACPI dependency to Kconfig entry
to fix a build error while CONFIG_ACPI is not set.

drivers/extcon/extcon-axp288.c: In function 'axp288_extcon_probe':
drivers/extcon/extcon-axp288.c:363:20: error: dereferencing pointer to incomplete type
    put_device(&adev->dev);

Fixes: 0cf064db ("extcon: axp288: Convert to use acpi_dev_get_first_match_dev()")
Reported-by: Hulk Robot <hulkci@huawei.com>
Suggested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>