elm fatfs support mkfs with no need to  run dfs_mount elm first; and can mount/umount/mkfs without reset any more
format dfs_elm.c with astyle
update dfs_xxx_mkfs in jffs2 nand uffs.c to use new args
change linebreak in dfs_uffs.c to unix style
1) elm fatfs can do mkfs without mounting first, 2) use new mkfs 3)change linebreak in dfs_uffs.c to unix