Input: atlas_btns - adds a missing owner field for atlas_acpi_driver

The owner field provides the link between drivers and modules in sysfs.
After setting the owner field, we can see which module provides which
driver and vice versa by looking at /sys/bus/acpi/drivers/Atlas ACPI/module
and /sys/module/atlas_btns/drivers/acpi:Atlas ACPI

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>