[WIP] Rewrite fan control

[crawfxrd]

Tired of fans going brr on boot or when you...start a YouTube video or something?

TODO

• [ ] Write a real summary and rationale for these changes
• [x] Handle min duty
  • Replace functionality of SMOOTH_FANS_MIN
• [ ] Evaluate if duty change is responsive enough to handle sudden heavy loads like compilation or gaming
  • Still provides enough heat dissipation?
• [ ] Check fans work on suspend entry/exit
  • Handling for S0ix?
• [x] Move fan tables to per-board fan.c files
• [x] Track level in table instead of calculating on every interval?
  • Know whether it's moving up/down
  • Separate column for up/down temps?
• [ ] Manual mode for system firmware/OS control of fans