nfs: Fix truncated client owner id without proto type

The length of "Linux NFSv4.0 " is 14, not 10.

Without this patch, I get a truncated client owner id as,
"Linux NFSv4.0 ::1/::1"

With this patch,
"Linux NFSv4.0 ::1/::1 tcp"

Fixes: a3192688 ("nfs: make nfs4_init_nonuniform_client_string use a dynamically allocated buffer")
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

fs/nfs/nfs4proc.c

@@ -5020,7 +5020,7 @@ nfs4_init_nonuniform_client_string(struct nfs_client *clp)
 		return 0;
 retry:
 	rcu_read_lock();
-	len = 10 + strlen(clp->cl_ipaddr) + 1 +
+	len = 14 + strlen(clp->cl_ipaddr) + 1 +
 		strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
 		1 +
 		strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +