[M] Change in flashrom[main]: libflashrom: Add set log level functionality

[Peter Marheine (Code Review)]

Attention is currently required from: Dmitry Zhadinets.

Peter Marheine has posted comments on this change by Dmitry Zhadinets. ( https://review.coreboot.org/c/flashrom/+/87047?usp=email )

Change subject: libflashrom: Add set log level functionality
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Patch Set 6:

(1 comment)

File libflashrom.c:

https://review.coreboot.org/c/flashrom/+/87047/comment/9ff9e5a1_eb94b135?usp... :
PS6, Line 36: enum flashrom_log_level global_log_level = FLASHROM_MSG_INFO;
It doesn't look like this needs external linkage, so it should be `static`.
```suggestion
static enum flashrom_log_level global_log_level = FLASHROM_MSG_INFO;
```