[dfs] sync cromfs (#6739)

components/dfs/Kconfig

@@ -142,7 +142,7 @@ if RT_USING_DFS
         default n
 
     config RT_USING_DFS_CROMFS
-        bool "Enable readonly compressed file system on flash"
+        bool "Enable ReadOnly compressed file system on flash"
         default n
         # select PKG_USING_ZLIB
 

components/dfs/filesystems/cromfs/SConscript

@@ -0,0 +1,11 @@
+# RT-Thread building script for component
+
+from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c')
+CPPPATH = [cwd]
+
+group = DefineGroup('Filesystem', src, depend = ['RT_USING_DFS','RT_USING_DFS_CROMFS'], CPPPATH = CPPPATH)
+
+Return('group')

components/dfs/filesystems/cromfs/dfs_cromfs.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020/08/21     ShaoJinchun  firset version
+ */
+
+#ifndef  __DFS_CROMFS_H__
+#define  __DFS_CROMFS_H__
+
+int dfs_cromfs_init(void);
+
+#endif  /*__DFS_CROMFS_H__*/