add elm_init function declaration.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@394 bbd45198-f89e-11dd-88c7-29a3b14d5316

filesystem/dfs/include/dfs_elm.h

+/*
++------------------------------------------------------------------------------
+| Project   : Device Filesystem
++------------------------------------------------------------------------------
+| Copyright 2004, 2005  www.fayfayspace.org.
+| All rights reserved.
+|------------------------------------------------------------------------------
+| File      : dfs_efs.h
+|------------------------------------------------------------------------------
+| Chang Logs:
+| Date           Author       Notes
+| 2010-02-06     Bernard      Add elm_init function declaration
++------------------------------------------------------------------------------
+*/
+
+#ifndef __DFS_ELM_H__
+#define __DFS_ELM_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int elm_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif