[L] Change in coreboot[main]: drivers/spi: add RPMC support

[Felix Held (Code Review)]

Attention is currently required from: Marshall Dawson, Matt DeVillier.

Felix Held has posted comments on this change by Felix Held. ( https://review.coreboot.org/c/coreboot/+/84837?usp=email )

Change subject: drivers/spi: add RPMC support
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Patch Set 10:

(3 comments)

File src/drivers/spi/spi_flash_rpmc.c:

https://review.coreboot.org/c/coreboot/+/84837/comment/e1f73003_c0b776b2?usp... :
PS9, Line 250: 	memcpy(&buf[8], signature, SPI_RPMC_SIG_LEN);
> Could consider using [4+SPI_RPMC_KEY_DATA_LEN], similar to line 218.

good point; updated the code

https://review.coreboot.org/c/coreboot/+/84837/comment/348d3f2b_ed8e49ae?usp... :
PS9, Line 281: 	memcpy(&buf[8], signature, SPI_RPMC_SIG_LEN);
> similar

Done

https://review.coreboot.org/c/coreboot/+/84837/comment/76f30267_16e7e0ed?usp... :
PS9, Line 314: 	memcpy(&buf[16], signature, SPI_RPMC_SIG_LEN);
> similar

Done