f808c43ad9 introduced a FreeBSD specific
behaviour to wait for firmware load completion before returning from
loading the driver. This does no longer allow iwl_drv_stop to detect
that startup has completed and it will wait indefinitely for a
completion event that will not happen.
We could change the complete() call to a complete_all() but to avoid
confusion, future side effects, and for simplicity daisy-chain two
complete events in FreeBSD.
PR: 267869
Reported by: Peter Much (pmc citylink.dinoex.sub.org)
Tested by: Peter Much (pmc citylink.dinoex.sub.org)
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
bee60c9897