CB2+M8P host error on shutdown

When you turn off the screen, the error “Failed then power to host :call to poweroff Failed: action poweroff already in progress, refusing requested poweroff operation” appears. PD pin 14 does not change state when turned off.

[output_pin POWER_CONTROL]
pin: PD14
pwm: False
value: 0
shutdown_value: 1

Reproduce the shutdown behavior on a CB2 with the CB2+M8P setup and compare the reported poweroff error with the POWER_CONTROL output_pin configuration for PD14. Check whether PD14 changes state when the screen is turned off; done means the shutdown error and pin-state behavior are resolved.

Written by the indexing model from the issue text.