EDAC: i7core: Use static attribute groups for sysfs entries

... instead of manual device_create_file() and device_remove_file()
calls.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
[ Add NULL terminator to i7core_dev_attrs[] caught by the build robot. ]
Reported-by: Huang Ying <ying.huang@intel.com>
Link: http://lkml.kernel.org/r/1423046938-18111-6-git-send-email-tiwai@suse.de
Signed-off-by: Borislav Petkov <bp@suse.de>

diff --cc drivers/edac/i7core_edac.c
Simple merge