[Toybox] fdisk and BIG drives

[scsijon]

Apparently busybox's fdisk has problems with 8TB drives, see:-

https://bkhome.org/news/202003/busybox-fdisk-cannot-handle-8tb-drive.html

Rob, can you check toybox's out please and if necessary try to fix, i'd 
rather not have a red-face situation when I next 'show-it-off' in May, 
especially with giant 14tb (seagate) 15tb drives (WD) out there already 
and up to 30tb promised by the coming christmas.

thanks
scsijon