ceph: delete repeated words in fs/ceph/

Drop duplicated words "down" and "the" in fs/ceph/.

[ idryomov: merge into a single patch ]

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>