EXFAT: more updates from @lqs Thanks a lot :)

https://github.com/dorimanx/exfat-nofuse/commit/d20735c6e81d05a8409ebd8326f3bdb3c16ac715
https://github.com/dorimanx/exfat-nofuse/commit/c8752270c08cad7486e502172ef6e1dc78f68085
https://github.com/dorimanx/exfat-nofuse/commit/e03f72516a65b73b376b74c547100a1c4da80022