[L] Change in coreboot[master]: mb/{skl,kbl}: Use true/false keywords for non-array dt options

[Felix Singer (Code Review)]

Attention is currently required from: Angel Pons, Frans Hendriks, Jeremy Soller, Michael Niewöhner, Michał Żygowski, Nico Huber, Piotr Król, Sean Rhodes, Tim Crawford.

Felix Singer has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/75888?usp=email )

Change subject: mb/{skl,kbl}: Use true/false keywords for non-array dt options
......................................................................

Patch Set 5:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/75888/comment/7d2a6be0_95d16f1d :
PS5, Line 13: While on it, remove the quotes from the option name and from the value.
> Huh, how does this work? Is there special support in SCONFIG? Currently, it looks rather odd because […]

The quotes are actually optional. They are only needed if the values contains spaces.