[flashrom-gerrit] Change in flashrom[master]: programmer: Introduce default shutdown function

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Nico Huber, Edward O'Callaghan, Angel Pons.
Anastasia Klimchuk has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/54890 )

Change subject: programmer: Introduce default shutdown function
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Patch Set 4:

(2 comments)

Commit Message:

https://review.coreboot.org/c/flashrom/+/54890/comment/1c6afdd1_03de0eef 
PS1, Line 13: lot of par masters that
            : will use it in the nearest future.
> I have an update: there are 4 more customers that would be using default_shutdown function (bitbang  […]

I am resolving the comment, this is ready for review.

Patchset:

PS4: 
rebased on the top of latest changes