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hostmot2: fix input bounds, divisors and PWM clamping - #4661

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sleepybishop wants to merge 11 commits into

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sleepybishop:hostmot-fixes

Commits on Oct 10, 2026
- hostmot2: validate UART sends and pack bytes without signed shifts
  sleepybishop
  committed
  1f8381d
- hostmot2: validate BSPI channels and clock frequency
  sleepybishop
  committed
  54043f9
- hostmot2: clamp input scan divisors safely
  sleepybishop
  committed
  77467a9
- hostmot2: bound connector pin names and correct port diagnostics
  sleepybishop
  committed
  b031eb5
- hostmot2: reject zero resolver index divisors
  sleepybishop
  committed
  e5dedcd
- hostmot2: decode the slowest RPi3 SPI clock divisor
  sleepybishop
  committed
  510012e
- hostmot2: clamp negative B and C phase PWM values
  sleepybishop
  committed
  c4af04e
- hostmot2: preserve UART send validation error returns
  sleepybishop
  committed
  de916be
- hostmot2: handle UART and BSPI LLIO failures consistently
  sleepybishop
  committed
  d68621a
- hostmot2: round minimum INM and INMUX scan rates up
  sleepybishop
  committed
  74bc083
- hostmot2: invalidate UART rate before reconfiguration
  sleepybishop
  committed
  b9b5a0f