EDAC: Fix typos in Documentation/edac.txt

Fix various typos in Documentation/edac.txt.

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Link: http://lkml.kernel.org/r/1434694714-2924-1-git-send-email-ramirose@gmail.com


Signed-off-by: Borislav Petkov <bp@suse.de>