NFS: lookup supports alternate client

A later patch will need to perform a lookup using an
alternate client with a different security flavor.
This patch adds support for doing that on NFS v4.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 72e0bdd..1ec5d06 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -296,12 +296,14 @@
 			    rpc_authflavor_t authflavour,
 			    int noresvport);
 extern void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data);
-extern int _nfs4_call_sync(struct nfs_server *server,
+extern int _nfs4_call_sync(struct rpc_clnt *clnt,
+			   struct nfs_server *server,
 			   struct rpc_message *msg,
 			   struct nfs4_sequence_args *args,
 			   struct nfs4_sequence_res *res,
 			   int cache_reply);
-extern int _nfs4_call_sync_session(struct nfs_server *server,
+extern int _nfs4_call_sync_session(struct rpc_clnt *clnt,
+				   struct nfs_server *server,
 				   struct rpc_message *msg,
 				   struct nfs4_sequence_args *args,
 				   struct nfs4_sequence_res *res,