[M] Change in flashrom[main]: flashrom_tester: Fix partial_lock_test on libflashrom

[Edward O'Callaghan (Code Review)]

Attention is currently required from: Evan Benn, Hsuan-ting Chen.

Edward O'Callaghan has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/79304?usp=email )

Change subject: flashrom_tester: Fix partial_lock_test on libflashrom
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Patch Set 2:

(1 comment)

File util/flashrom_tester/flashrom/src/flashromlib.rs:

https://review.coreboot.org/c/flashrom/+/79304/comment/987896eb_ee8796fa :
PS1, Line 200:             .flag_set(FlashromFlag::FlashromFlagSkipUnreadableRegions, true);
> Those should be CrOS only default value. […]

These two are to handle the case of the CSME locking parts of flash. They are therefore outside the scope of a default value for the flags type so should be set explicitly with a comment about why.