Change in flashrom[master]: libflashrom: Return progress state to the library user

[Daniel Campello (Code Review)]

Attention is currently required from: Richard Hughes, Edward O'Callaghan, Angel Pons, Anastasia Klimchuk, Patrick Rudolph, Peter Marheine.
Daniel Campello has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/49643 )

Change subject: libflashrom: Return progress state to the library user
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Patch Set 9:

(2 comments)

Patchset:

PS4:
> I think the context of adding support to programmers is useful to understand the needs of the framew […]

Ack

File 82802ab.c:

https://review.coreboot.org/c/flashrom/+/49643/comment/8b1cdcaa_67209e22 
PS8, Line 137: 		set_progress(flash, FLASHROM_PROGRESS_WRITE, i + 1, len);
> Updating progress on every byte seems pretty costly. […]

Does it make sense to switch the callback method to take a `int percentage` instead of current and total and have the callback be called max 100 times instead on each byte update?