[M] Change in flashrom[main]: ch347_spi: Add spi clock frequency selection

[Nicholas Chin (Code Review)]

Attention is currently required from: Anastasia Klimchuk, ZhiYuanNJ.

Nicholas Chin has posted comments on this change by ZhiYuanNJ. ( https://review.coreboot.org/c/flashrom/+/82776?usp=email )

Change subject: ch347_spi: Add spi clock frequency selection
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Patch Set 10:

(1 comment)

File ch347_spi.c:

https://review.coreboot.org/c/flashrom/+/82776/comment/8cfca522_10cbade0?usp... :
PS7, Line 365: 30MHz
> What is the CH347T device revision that can reproduce this phenomenon?

I'd have to do a bit of digging as I don't know of a quick way to find this. I don't remember seeing a way to retrieve this from WCH's example applications, but I think there was a call in the API for their library that can retrieve this. In any case, I bought mine in September 2022, and I think the CH347T was still fairly new at the time.