EDAC, skx_edac: Fix non static symbol warnings

EDAC, skx_edac: Fix non static symbol warnings

Fix the following sparse warnings:

  drivers/edac/skx_edac.c:266:25: warning:
   symbol 'skx_cpuids' was not declared. Should it be static?
  drivers/edac/skx_edac.c:1040:12: warning:
   symbol 'skx_init' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1477147098-2842-1-git-send-email-weiyj.lk@gmail.com
Signed-off-by: Borislav Petkov <bp@suse.de>