Lunatic Rave 2 not working with beefboard anymore

[Mechada2dx]

Ever since I switched from purple beefboards to the newer black ones, LR2 won't take input from them anymore, digital turntable still works though. I've tried 2 USB mode instead of 1 USB and even tried running LR2 on different computers but still nothing.

[HWXLR8]

@ASleepyCat there should be no functional difference between these PCB revisions (v4 vs v6), I believe this is a FW regression. Thoughts on exposing FW version somehow to allow us to more easily debug issues like this in the future?

[ASleepyCat]

@Mechada2dx Could you see if SDVX mode works for the buttons? Just want to check a theory. (Actually this probably won't work since the digital TT works, but oh well)

@HWXLR8 Maybe, if there's a handy way of embedding the current commit hash into the fw. I know roxy-firmware shows the board fw version somewhere in roxy-tool (and probably the same with whatever arcin uses for its config tool), but we only have a rudimentary fw flashing tool.

[ASleepyCat]

I've identified the issue and pushed the fix as part of #88. It's untested though since I can't get to the key config (LR2HD issue? I forgot), but button inputs should at least be working again.