lockd: Don't expose the process pid to the NLM server

Instead we use the nlm_lockowner->pid.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/lockd/xdr.h b/include/linux/lockd/xdr.h
index d7a5cc4..bb0a0f1 100644
--- a/include/linux/lockd/xdr.h
+++ b/include/linux/lockd/xdr.h
@@ -28,6 +28,7 @@
 	int			len; 	/* length of "caller" */
 	struct nfs_fh		fh;
 	struct xdr_netobj	oh;
+	u32			svid;
 	struct file_lock	fl;
 };