mount: copy the port field into the cloned nfs_server structure.

Doing this copy eliminates the "port=0" entry in
the /proc/mounts entries

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=69241

Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

fs/nfs/client.c

@@ -820,6 +820,7 @@ void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *sour
 	target->caps = source->caps;
 	target->options = source->options;
 	target->auth_info = source->auth_info;
+	target->port = source->port;
 }
 EXPORT_SYMBOL_GPL(nfs_server_copy_userdata);