peci: Unplugging display from TBT port causes command timeouts

[crawfxrd]

• Model: oryp11
• EC version: dd555b9
• OS: Pop!_OS 22.04
• Kernel: 6.2.7-060207-generic

Unplugging a display connected to the TBT port causes PECI GetTemp() timeouts.

Steps to reproduce

1. Plug in a display to the TBT port
2. Power on system, booting to OS
3. Unplug the display

Expected behavior

• PECI commands resume normal operation
• CPU temp reporting is accurate

Actual behavior

• PECI commands begin timing out and do not recover
• CPU temp reported is always 0

Additional info

This specifically affects the PECI-over-eSPI implementation (CONFIG_PECI_OVER_ESPI=y).

Acknowledging the completion in #368 fixed it from hanging on shutdown.

Presumably, this could happen because of

• invalid/insufficient checks in peci_available()
• missing the check to see if a transaction is currently in progress in peci_get_temp()
• an issue specifically with eSPI usage?

Blocks: #370

[crawfxrd]

PECI over eSPI is now used by

• addw4
• lemp13
• lemp13-b
• oryp11
• oryp12

While GetTemp is the most likely PECI call to fail, #525 shows that WrPkgConfig also can fail because of this.