[chirp_devel] [PATCH] Figured out encryption algorithm and implement functions for Wouxun KG-UV8D Plus #5123

[KS]

Fixed all problems reported by Dan after review. Checked with radio to 
address some of the issues.
One of the issue is still to do (reading memory), but this might take a 
lot of time to figure out how it can work more efficient.
This issue is not causing any problems and works fine.

Kind regards
Krystian Struzik