EDAC, xgene: Drop owner assignment from platform_driver

platform_driver does not need to set an owner because
platform_driver_register() will set it.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Loc Ho <lho@apm.com>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Link: http://lkml.kernel.org/r/1436507243-11159-1-git-send-email-k.kozlowski@samsung.com
Signed-off-by: Borislav Petkov <bp@suse.de>