NFS: Rename struct nfs4_client to struct nfs_client

Rename struct nfs4_client to struct nfs_client so that it can become the basis
for a general client record for NFS2 and NFS3 in addition to NFS4.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index b1f7dc4..1b596b6 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -167,7 +167,7 @@
 static int nfs_callback_authenticate(struct svc_rqst *rqstp)
 {
 	struct in_addr *addr = &rqstp->rq_addr.sin_addr;
-	struct nfs4_client *clp;
+	struct nfs_client *clp;
 
 	/* Don't talk to strangers */
 	clp = nfs4_find_client(addr);