commit f34cd9ca upstream.

samsung-laptop is not at all related to ACPI, but since this interface
is not documented at all, and the driver has to use it at load to
understand how it works on the laptop, I think it's a good idea to
disable it if a better solution is available.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
[bwh: Backported to 3.2:
 - Adjust context, and change return to goto, since we do not have commit
   5dea7a20 ('samsung-laptop: move code into init/exit functions')
 - Use static variable since we do not have commit a6df4894
   ('samsung-laptop: put all local variables in a single structure')]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>