MAINTAINERS: Change Johannes Thumshirn's email address

MAINTAINERS: Change Johannes Thumshirn's email address

Change my email address to something that is not associated with my
current or future employer.

Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: linux-watchdog@vger.kernel.org
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: http://lkml.kernel.org/r/1430986884-8760-1-git-send-email-jthumshirn@suse.de
Signed-off-by: Borislav Petkov <bp@suse.de>