Change in flashrom[master]: sb600spi.c: Add Promontory chipset rev 0x71

[Felix Held (Code Review)]

Attention is currently required from: Paul Menzel, Edward O'Callaghan, Karthik Ramasubramanian.
Felix Held has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/63423 )

Change subject: sb600spi.c: Add Promontory chipset rev 0x71
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Patch Set 2: Code-Review+2

(1 comment)

Patchset:

PS2: 
the whole detection logic should probably be reworked in the future, but for now adding the new revision id should be fine. i'd expect that we don't need to look at the smbus pci revision id at all for the lpc pci device with the device id 0x790e, since all of those will have the spi100 engine. right now i'd assume that we only need to distinguish between the pre-spi100 and spi100 engine