[chirp_devel] Update to TYT TH-UV8000 Driver

[Dan Smith]

> So in other words, there is more to it than just adding
> "rf.valid_tuning_steps" with a list of steps.

Yep, which is why I haven't done it. There's a bug about this somewhere where someone posted a modified file which claims to work, but IIRC it failed a bunch of tests, which tells me it works for the frequencies in that guy's radio but not generally. I asked for clarification on something (since I don't have a radio with which to test) and never got a response (that I know of).

--Dan