[M] Change in flashrom[main]: Display progress for what is actually erased/written

[Sergii Dmytruk (Code Review)]

Attention is currently required from: Anastasia Klimchuk.

Sergii Dmytruk has posted comments on this change by Anastasia Klimchuk. ( https://review.coreboot.org/c/flashrom/+/84439?usp=email )

Change subject: Display progress for what is actually erased/written
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Patch Set 17: Code-Review+2

(2 comments)

Patchset:

PS16:
> Just out of curiosity I ran the test case from here https://review.coreboot. […]

Read also reaches 50% for the second command:
```
Found Winbond flash chip "W25Q128.V" (16384 kB, SPI) on dummy.
Reading old flash chip contents...
[READ: 100%]...done.
Updating flash chip contents...
[READ: 50%][ERASE: 50%][WRITE: 100%]...Erase/write done from 0 to ffffff
Verifying flash...
[READ: 100%]...VERIFIED.
```
Erasure is probably the result of selecting more fine-grained erasure functions in `erasure_layout.c`.  Not sure about reads.

File flashrom.c:

https://review.coreboot.org/c/flashrom/+/84439/comment/a8f29ee5_d947e26b?usp... :
PS13, Line 1270: // FIXME: round up to granularity?
> Okay so I will close this (and the other one). […]

Sure.