MAINTAINERS: Fix EDAC repo URLs format

Make it comply with the T: format.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Link: http://lkml.kernel.org/r/20151218080625.745540243@intel.com


Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>