readd Samsung's exFAT module 1.2.4

Signed-off-by: Paul <javelinanddart@gmail.com>

Conflicts:
	fs/exfat/Makefile
	fs/exfat/README
	fs/exfat/exfat.c
	fs/exfat/exfat.h
	fs/exfat/exfat_api.c
	fs/exfat/exfat_api.h
	fs/exfat/exfat_blkdev.c
	fs/exfat/exfat_blkdev.h
	fs/exfat/exfat_cache.c
	fs/exfat/exfat_cache.h
	fs/exfat/exfat_config.h
	fs/exfat/exfat_data.c
	fs/exfat/exfat_data.h
	fs/exfat/exfat_global.c
	fs/exfat/exfat_global.h
	fs/exfat/exfat_nls.c
	fs/exfat/exfat_nls.h
	fs/exfat/exfat_oal.c
	fs/exfat/exfat_oal.h
	fs/exfat/exfat_part.h
	fs/exfat/exfat_super.c
	fs/exfat/exfat_super.h
	fs/exfat/exfat_upcase.c
	fs/exfat/exfat_version.h