Change in coreboot[master]: drivers/efi: Add EFI variable store option support

[Angel Pons (Code Review)]

Attention is currently required from: Sean Rhodes, Martin Roth, Patrick Rudolph, Matt DeVillier, Arthur Heymans.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52564 )

Change subject: drivers/efi: Add EFI variable store option support
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Patch Set 10:

(2 comments)

File src/drivers/efi/efivars.c:

https://review.coreboot.org/c/coreboot/+/52564/comment/bbbabd12_f6714d7b 
PS10, Line 75: WA
> W=WCHAR […]

rdev_strcmp_wchar_ascii I guess? I've never seen `WA` in this context before.

https://review.coreboot.org/c/coreboot/+/52564/comment/86aa5763_5345c48f 
PS10, Line 271: void *
> The third argument of walk_variables has the function prototype: […]

Ah, I see. This could be a pointer to something else, e.g. if the `find_and_copy()` function is used.