Change x86 EDAC platform drivers to verify the module owner at the
beginning of their module init functions. This allows them to fail their
init immediately when ghes_edac is enabled. Similar change can be made
to other edac drivers if necessary.

Also, remove ".c" from module names of pnp2_edac, sb_edac, and skx_edac.
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Suggested-by: Borislav Petkov <bp@alien8.de>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20170823225447.15608-6-toshi.kani@hpe.comSigned-off-by: Borislav Petkov <bp@suse.de>