[L] Change in flashrom[master]: Add initial CH347T SPI programmer

[Angel Pons (Code Review)]

Attention is currently required from: qianfan, Nicholas Chin, Angel Pons.

Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/70529 )

Change subject: Add initial CH347T SPI programmer
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Patch Set 6:

(2 comments)

File ch347t_spi.c:

https://review.coreboot.org/c/flashrom/+/70529/comment/786bc1e6_0773826c 
PS5, Line 169: if (n > CH347_MAX_DATA_WRITE)
             : 			n = CH347_MAX_DATA_WRITE;
> I can't find a better idea, could you please give me some advices?

Oh wait, this is chunking the transfers, right? It's a bit confusing because the chunk size goes through `libusb_bulk_transfer()`. If so, then this seems reasonable. No idea if flashrom has a `MIN(a, b)` macro somewhere; if it does, then one could do:

size_t n = MIN(sz, CH347_MAX_DATA_WRITE);

https://review.coreboot.org/c/flashrom/+/70529/comment/a5970d6c_723fe928 
PS5, Line 279: 	memset(&csctrl, 0, sizeof(csctrl));
> OK

Thanks!

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