[M] Change in flashrom[master]: writeprotect.c: differentiate lack of WP from lack of implementation

[Sergii Dmytruk (Code Review)]

Attention is currently required from: Nico Huber, Nikolai Artemiev.

Sergii Dmytruk has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/68221 )

Change subject: writeprotect.c: differentiate lack of WP from lack of implementation
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Patch Set 4:

(1 comment)

Commit Message:

https://review.coreboot.org/c/flashrom/+/68221/comment/c60c949e_e6df73be 
PS4, Line 10: preventing confusion
> (I only had a quick look at the code, so sorry if I'm off the rails here.) […]

I guess it depends on the meaning of `NT`. I took it as "unknown" which can also include `NA`. Setting `NA` correctly for all the chips would also produce lots of new chip entries. I would specify `NA` where it's well known to have no WP and left "chip unsupported" message for the rest. If you find this problematic, can drop this change.