xfs: xfs_qm_dquot_isolate needs locking annotations for sparse

To remove noise from the build.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 1023210..d68f230 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -434,6 +434,7 @@
 	struct list_head	*item,
 	spinlock_t		*lru_lock,
 	void			*arg)
+		__releases(lru_lock) __acquires(lru_lock)
 {
 	struct xfs_dquot	*dqp = container_of(item,
 						struct xfs_dquot, q_lru);