[L] Change in flashrom[master]: flashrom: Skip read/write/erase/verify ops on inaccessable flash regions

[Nikolai Artemiev (Code Review)]

Attention is currently required from: Edward O'Callaghan, Angel Pons.

Nikolai Artemiev has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/70128 )

Change subject: flashrom: Skip read/write/erase/verify ops on inaccessable flash regions
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Patch Set 20:

(1 comment)

Commit Message:

https://review.coreboot.org/c/flashrom/+/70128/comment/993a208d_8490e962 
PS6, Line 11: platforms with active an CSME coprocessor.
> Ack, we can handle the cases differently. […]

Ok I've uploaded a new patchset with some flags to control this behavior. I think it's best to have two flags, one for skipping read protected regions and one for skipping write protected regions.

That way it's possible to configure the exact behavior you want, e.g. for verify:

```
strictly verify everything    -> skip_unreadable=false, skip_unwriteable=false

verify everything we can read -> skip_unreadable=true,  skip_unwriteable=false

verify only RW regions        -> skip_unreadable=true,  skip_unwriteable=true
```