ACPI: bay: remove ACPI driver struct

The bay driver is a platform driver, and doesn't need to also be an acpi
driver.  Remove the acpi driver related structures and callbacks, they didn't
do anything anyway.  Switch to uevent for user space event notification.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>