[XS] Change in coreboot[main]: mb/google/oak: Don't build the ChromeEC codebase by default

[Julius Werner (Code Review)]

Attention is currently required from: Hung-Te Lin, Martin L Roth.

Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81023?usp=email )

Change subject: mb/google/oak: Don't build the ChromeEC codebase by default
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Patch Set 2: Code-Review+2

(2 comments)

Patchset:

PS2:
> I have a fix for depthcharge (crrev.com/c/5333904). […]

(Probably not quite the right place to have this conversation, but) can we just update the bmpblk boards.yaml file to only build English language for those boards on ToT (and then enable their bootimage flag again)? I think it's generally nice to keep things working on ToT where possible, and as long as we're still running the builder anyway...

PS2: 
FWIW I also don't know why this is enabled for Oak but nothing else. It seems like Patrick just enabled it for everything once upon a time (CB:13548) and all the others got slowly removed again for various reasons until Oak was the last one standing.