ocfs2: Remember rw lock level during direct io

Cluster locking might have been redone because a direct write won't
complete, so this needs to be reflected in the iocb.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

diff --cc fs/ocfs2/aops.c
Simple merge

diff --cc fs/ocfs2/aops.h
Simple merge

diff --cc fs/ocfs2/file.c
Simple merge