[XS] Change in coreboot[main]: mb/google/nissa/var/riven: Set PCIe root port 4 speed to Gen2

[Subrata Banik (Code Review)]

Attention is currently required from: David Wu, Dinesh Gehlot, Eric Lai, Jayvik Desai, Kapil Porwal, Nick Vaccaro.

Subrata Banik has posted comments on this change by David Wu. ( https://review.coreboot.org/c/coreboot/+/85520?usp=email )

Change subject: mb/google/nissa/var/riven: Set PCIe root port 4 speed to Gen2
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Patch Set 1:

(1 comment)

File src/mainboard/google/brya/variants/riven/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/85520/comment/efb3b387_2be8a939?usp... :
PS1, Line 490: 	.pcie_rp_pcie_speed = 2,
why we need to set wifi7 as Gen2 ?