EDAC, edac_module.c: Remove unnecessary test on unsigned value

unsigned long value is never < 0.

Cc: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Link: http://lkml.kernel.org/r/1402341618-10674-1-git-send-email-fabf@skynet.be


Signed-off-by: Borislav Petkov <bp@suse.de>