exfat: release 6.0.0 version

Major changes are:

• Use updated exfat_chain directly instead of snapshot values in rename.
• fix the error code of rename syscall.
• cleanup and suppress the superfluous error messages.
• remove duplicate directory entry update.
• fix integer overflow on large partition.

exfat: release 5.19.1 version

Major changes are:

• fix referencing wrong parent directory information during rename.
• introduce a sys_tz mount option to use system timezone.
• improve performance while zeroing a cluster with dirsync mount option.
• fix slab-out-bounds in exat_clear_bitmap() reported from syzbot.
• Add keep_last_dots mount option to allow access to paths with trailing dots.
• Avoid repetitive volume dirty bit set/clear to improve storage life time.
• Fix ->i_blocks truncation issue that still exists elsewhere.
• 4 cleanups & typos fixes.
• Move super block magic number to magic.h
• Fix missing REQ_SYNC in exfat_update_bhs().
• Fix ->i_blocks truncation issue caused by wrong 32bit mask.

exfat: release 5.12.3 version

Major changes are:

• Add support for FITRIM.
• Improve write perofmrance on dirsync mount.
• Improve lookup perofmrance.
• Fix a bug on discard mount.

exfat: release 5.11.1 version

Major changes are:

• Avoid page allocation failure from upcase table allocation.

exfat: release 5.10.1 version

Major changes are:
- Don't clear MediaFailure and VolumeDirty bit in volume flags
if these were already set before mounting.
- Fix use of uninitialized spinlock on error path.
- Fix missing err assignment in exfat_build_inode().
- cleanup codes and remove unneeded codes.

exfat: release 5.8.7 version

Description for this pull request:

• fix wrong size update of stream entry.
• fix endianness of upname in name_hash computation.

exfat: release 5.8.4 version

• Zero out unused characters of FileName field to avoid a complaint from some fsck tool.
• Fix memory leak on error paths.
• Fix unnecessary VOL_DIRTY set when calling rmdir on non-empty directory.
• Call sync_filesystem() for read-only remount(Fix generic/452 test in xfstests)
• Add own fsync() to flush dirty metadata.
• fix overflow issue while calculating sector number.

Release exfat 5.8.1 version

• Bug fixes

  • Fix memory leak on mount failure with iocharset= option.
  • Fix Incorrect update of stream entry.
  • Fix cluster range validation error.

• Clean-up codes

  • Remove unused code and unneeded assignment.
  • Rename variables in exfat structure as specification.
  • Reorganize boot sector analysis code.
  • Simplify exfat_utf8_d_hash and exfat_utf8_d_cmp().
  • Optimize exfat entry cache functions.
  • Improve wording of EXFAT_DEFAULT_IOCHARSET config option.

• New Feature

  • Add boot region verification.