MAINTAINERS: Add "K:" pattern for trivial

Since scripts/get_maintainer.pl was updated to search content before the
patch by commit 7764dcb5 ("get_maintainer.pl: allow "K:" pattern tests to
match non-patch text") perhaps this might direct a few more patches the
right place.

Original-patch-by: L. Alberto Gim?nez <agimenez@sysvalve.es>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>