xfs: cleanup dquot locking helpers

Mark the trivial lock wrappers as inline, and make the naming consistent
for all of them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

diff --cc fs/xfs/xfs_dquot.c
Simple merge

diff --cc fs/xfs/xfs_dquot.h
Simple merge

diff --cc fs/xfs/xfs_dquot_item.c
Simple merge

diff --cc fs/xfs/xfs_qm.c
Simple merge