[M] Change in flashrom[main]: libflashrom: Update the API for Logger Callback

[Peter Marheine (Code Review)]

Attention is currently required from: Anastasia Klimchuk, Dmitry Zhadinets.

Peter Marheine has posted comments on this change by Dmitry Zhadinets. ( https://review.coreboot.org/c/flashrom/+/86875?usp=email )

Change subject: libflashrom: Update the API for Logger Callback
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Patch Set 11:

(2 comments)

File libflashrom.c:

https://review.coreboot.org/c/flashrom/+/86875/comment/808db232_b1b0c923?usp... :
PS11, Line 68: 	va_copy(args_attempt, args);
This size is no longer useful; we can omit this first `vsprintf` completely because the buffer is now statically allocated.

https://review.coreboot.org/c/flashrom/+/86875/comment/5c2b0609_87d01021?usp... :
PS11, Line 80: ld
Use `z` since this should be `size_t` (due to `sizeof`).