FAT filesystem support

[Sascha Hauer]

The following adds FAT read/write support to barebox.

Sascha Hauer (1):
      fs: add fat filesystem support

 fs/Kconfig       |    2 +
 fs/Makefile      |    1 +
 fs/fat/Kconfig   |   15 +
 fs/fat/Makefile  |    1 +
 fs/fat/diskio.h  |   78 ++
 fs/fat/fat.c     |  434 +++++++++
 fs/fat/ff.c      | 2761 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 fs/fat/ff.h      |  239 +++++
 fs/fat/ffconf.h  |  145 +++
 fs/fat/integer.h |   28 +
 10 files changed, 3704 insertions(+), 0 deletions(-)
 create mode 100644 fs/fat/Kconfig
 create mode 100644 fs/fat/Makefile
 create mode 100644 fs/fat/diskio.h
 create mode 100644 fs/fat/fat.c
 create mode 100644 fs/fat/ff.c
 create mode 100644 fs/fat/ff.h
 create mode 100644 fs/fat/ffconf.h
 create mode 100644 fs/fat/integer.h