SUNRPC: Fix sparse warnings

 - net/sunrpc/xprtsock.c:1635:5: warning: symbol 'init_socket_xprt' was not
   declared. Should it be static?
 - net/sunrpc/xprtsock.c:1649:6: warning: symbol 'cleanup_socket_xprt' was
   not declared. Should it be static?

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h
index 4a68125..ad29376 100644
--- a/include/linux/sunrpc/rpc_pipe_fs.h
+++ b/include/linux/sunrpc/rpc_pipe_fs.h
@@ -47,6 +47,8 @@
 extern int rpc_unlink(struct dentry *);
 extern struct vfsmount *rpc_get_mount(void);
 extern void rpc_put_mount(void);
+extern int register_rpc_pipefs(void);
+extern void unregister_rpc_pipefs(void);
 
 #endif
 #endif