[M] Change in flashrom[main]: tree: Update 'sb600' references to 'amd'

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Edward O'Callaghan, Martin L Roth, Thomas Heijligen.

Anastasia Klimchuk has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/74953?usp=email )

Change subject: tree: Update 'sb600' references to 'amd'
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Patch Set 2:

(1 comment)

File amd_spi.c:

https://review.coreboot.org/c/flashrom/+/74953/comment/7b5eb5a8_ee92af7f :
PS1, Line 156: amd_spibar
> Minor: Since these function parameters are stack local to the working function, how about just dropp […]

I think it's a good idea, would you agree if I do it later in another patch? It's much easier to review this patch when it changes all sb600 into amd.
But I agree with you idea.