Change in coreboot[master]: drivers/i2c/generic: Set SW0 to 3 for wake device

[Edward O'Callaghan (Code Review)]

Attention is currently required from: Furquan Shaikh, Tony Huang, Keith Tzeng, Wisley Chen.
Edward O'Callaghan has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52847 )

Change subject: drivers/i2c/generic: Set SW0 to 3 for wake device
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Patch Set 1: Code-Review+1

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/52847/comment/15a1de0c_8103a4f6 
PS1, Line 9: 3
Only because this commit impacts many boards can you elaborate a little more why `3` and not `4` to help if someone does need to bisect back to this for their board.

File src/drivers/i2c/generic/generic.c:

https://review.coreboot.org/c/coreboot/+/52847/comment/9fc7b4b0_7d07adcd 
PS1, Line 101: 3);
please update `Documentation/acpi/devicetree.md` as well.