upgrade fatfs to 0.14b

[wentongwu]

Current revision in the tree is 0.12b, but since then there are lots of enhancements, I think it's better to upgrade fatfs to 0.14b. Hope the maintainers who have bandwidth can upgrade it 0.14b. Thanks a lot!

R0.14b (April 17, 2021)
  Made FatFs uses standard library <string.h> for copy, compare and search instead of built-in string functions.
  Added support for long long integer and floating point to f_printf(). (FF_STRF_LLI and FF_STRF_FP)
  Made path name parser ignores the terminating separator to allow "dir/".
  Improved the compatibility in Unix style path name feature.
  Fixed the file gets dead-locked when f_open() failed with some conditions. (appeared at R0.12a)
  Fixed f_mkfs() can create wrong exFAT volume due to a timing dependent error. (appeared at R0.12)
  Fixed code page 855 cannot be set by f_setcp(). (appeared at R0.13)
  Fixed some compiler warnings.


R0.14a (December 05, 2020)
  Limited number of recursive calls in f_findnext().
  Fixed old floppy disks formatted with MS-DOS 2.x and 3.x cannot be mounted.
  Fixed some compiler warnings.


R0.14 (October 14, 2019)
  Added support for 64-bit LBA and GUID partition table (FF_LBA64)
  Changed some API functions, f_mkfs() and f_fdisk().
  Fixed f_open() function cannot find the file with file name in length of FF_MAX_LFN characters.
  Fixed f_readdir() function cannot retrieve long file names in length of FF_MAX_LFN - 1 characters.
  Fixed f_readdir() function returns file names with wrong case conversion. (appeared at R0.12)
  Fixed f_mkfs() function can fail to create exFAT volume in the second partition. (appeared at R0.12)

R0.13c (October 14, 2018)
  Supported stdint.h for C99 and later. (integer.h was included in ff.h)
  Fixed reading a directory gets infinite loop when the last directory entry is not empty. (appeared at R0.12)
  Fixed creating a sub-directory in the fragmented sub-directory on the exFAT volume collapses FAT chain of the parent directory. (appeared at R0.12)
  Fixed f_getcwd() cause output buffer overrun when the buffer has a valid drive number. (appeared at R0.13b)


R0.13b (April 07, 2018)
  Added support for UTF-32 encoding on the API. (FF_LFN_UNICODE = 3)
  Added support for Unix style volume prefix. (FF_STR_VOLUME_ID = 2)
  Fixed accesing any object on the exFAT root directory beyond the cluster boundary can fail. (appeared at R0.12c)
  Fixed f_setlabel() does not reject some invalid characters. (appeared at R0.09b)


R0.13a (October 14, 2017)
  Added support for UTF-8 encoding on the API. (FF_LFN_UNICODE = 2)
  Added options for file name output buffer. (FF_LFN_BUF, FF_SFN_BUF).
  Added dynamic memory allocation option for working buffer of f_mkfs() and f_fdisk().
  Fixed f_fdisk() and f_mkfs() create the partition table with wrong CHS parameters. (appeared at R0.09)
  Fixed f_unlink() can cause lost clusters at fragmented file on the exFAT volume. (appeared at R0.12c)
  Fixed f_setlabel() rejects some valid characters for exFAT volume. (appeared at R0.12)


R0.13 (May 21, 2017)
  Changed heading character of configuration keywords "_" to "FF_".
  Removed ASCII-only configuration, FF_CODE_PAGE = 1. Use FF_CODE_PAGE = 437 instead.
  Added f_setcp(), run-time code page configuration. (FF_CODE_PAGE = 0)
  Improved cluster allocation time on stretch a deep buried cluster chain.
  Improved processing time of f_mkdir() with large cluster size by using FF_USE_LFN = 3.
  Improved NoFatChain flag of the fragmented file to be set after it is truncated and got contiguous.
  Fixed archive attribute is left not set when a file on the exFAT volume is renamed. (appeared at R0.12)
  Fixed exFAT FAT entry can be collapsed when write or lseek operation to the existing file is done. (appeared at R0.12c)
  Fixed creating a file can fail when a new cluster allocation to the exFAT directory occures. (appeared at R0.12c)


R0.12c (March 04, 2017)
  Improved write throughput at the fragmented file on the exFAT volume.
  Made memory usage for exFAT be able to be reduced as decreasing _MAX_LFN.
  Fixed successive f_getfree() can return wrong count on the FAT12/16 volume. (appeared at R0.12)
  Fixed configuration option _VOLUMES cannot be set 10. (appeared at R0.10c)