[L] Change in coreboot[master]: mb/intel/mtlrvp: Enable EC and building ChromeOS

[Jamie Ryu (Code Review)]

Attention is currently required from: Tarun Tuli, Subrata Banik, Wonkyu Kim, Ravishankar Sarawadi, Paul Menzel, Kapil Porwal, Angel Pons, Nick Vaccaro, Tim Wawrzynczak, Raj Astekar.

Jamie Ryu has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/66101 )

Change subject: mb/intel/mtlrvp: Enable EC and building ChromeOS
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Patch Set 8:

(4 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/66101/comment/661ae524_aba51cc5 
PS4, Line 9: add
> adds

Thanks for the comments. This is updated by patchset#5.

File src/mainboard/intel/mtlrvp/Kconfig:

https://review.coreboot.org/c/coreboot/+/66101/comment/5027fd40_37d2650a 
PS4, Line 45: 	default MTL_EC_DETECT
> Hmmm, `MTL_CHROME_EC` and `MTL_INTEL_EC` can be chosen manually, as they're part of a choice block.

I tried the override from config file, the config override works as intended and choose the EC config by the config file. Is there anything missing from the current implmentation?

https://review.coreboot.org/c/coreboot/+/66101/comment/1b2dd4dc_5c138b06 
PS4, Line 58:
> remove one extra line

removed the extra line. thanks.

File src/mainboard/intel/mtlrvp/dsdt.asl:

https://review.coreboot.org/c/coreboot/+/66101/comment/e6fce256_488a36a7 
PS4, Line 32: Chrome OS
> ChromeOS

Thanks. I removed the comments as it looks the description is redundant.