unicode cleanups, and split the data table into a separate module

Hi all,

this series is an alternate idea to split the utf8 table into a separate
module.  It comes with a whole lot of cleanups preloaded.

Diffstat:
 fs/ext4/super.c               |   31 +---
 fs/f2fs/super.c               |   30 +---
 fs/f2fs/sysfs.c               |    3 
 fs/unicode/Kconfig            |   13 +-
 fs/unicode/Makefile           |   13 +-
 fs/unicode/mkutf8data.c       |   24 +++
 fs/unicode/utf8-core.c        |  105 ++++++----------
 fs/unicode/utf8-norm.c        |  262 +++++-------------------------------------
 fs/unicode/utf8-selftest.c    |   94 +++++++--------
 fs/unicode/utf8data.c_shipped |   22 ++-
 fs/unicode/utf8n.h            |   81 ++++--------
 include/linux/unicode.h       |   35 +++++
 12 files changed, 260 insertions(+), 453 deletions(-)