Change in flashrom[master]: nic3com.c: Refactor singleton states into reentrant pattern

[Nico Huber (Code Review)]

Attention is currently required from: Angel Pons, Anastasia Klimchuk.
Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/55107 )

Change subject: nic3com.c: Refactor singleton states into reentrant pattern
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Patch Set 4: Code-Review+2

(1 comment)

Patchset:

PS2:
> I added init_err_cleanup_exit label, so now there is a cleanup. […]

Thanks. And right, would be bad to call it with a pointer to a local struct
if it would try to free that ;) We can re-visit this once common code takes
care of the `data` lifecycle.