[fatfs] Fix compile error

Author: onelife

src/rtconfig.h

@@ -142,8 +142,7 @@
 #define DFS_USING_WORKDIR
 // #define DFS_FILESYSTEMS_MAX             (2)     /* Max number of fs */
 // #define DFS_FD_MAX                      (4)     /* Max number of open file */
-#define RT_DFS_ELM_CODE_PAGE            (437)
-// #define RT_DFS_ELM_CODE_PAGE            936     /* (936) is wrong -_-! */
+#define RT_DFS_ELM_CODE_PAGE            437     /* (xxx) is wrong -_-! */
 // #define RT_DFS_ELM_LFN_UNICODE
 // #define RT_DFS_ELM_USE_EXFAT
 #if defined(RT_DFS_ELM_USE_EXFAT) || (RT_DFS_ELM_CODE_PAGE >= 900)