[S] Change in coreboot[main]: drivers/spi: Stop using a variable-length array

[Angel Pons (Code Review)]

Attention is currently required from: Arthur Heymans.

Angel Pons has posted comments on this change by Arthur Heymans. ( https://review.coreboot.org/c/coreboot/+/84059?usp=email )

Change subject: drivers/spi: Stop using a variable-length array
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Patch Set 1:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/84059/comment/c7c7fb7b_d5611a1b?usp... :
PS1, Line 25: Tested on Asrock B85M Pro4 (Winbond W25Q64FV), MRC cache still works.
This will need to be updated

File src/drivers/spi/spi_flash.c:

https://review.coreboot.org/c/coreboot/+/84059/comment/12bfaa35_0ef8ae0a?usp... :
PS1, Line 317: 		chunk_len = MIN(MAX_FLASH_CMD_DATA_SIZE, chunk_len);
Not sure about this part, does it truncate the write properly? Should it be an assertion of some kind or a check-and-fail thing? (`if (chunk_len > MAX_FLASH_CMD_DATA_SIZE) return -1;`)