[L] Change in coreboot[main]: mainboard: Drop redundant PciRpEnable from devicetrees

[Felix Singer (Code Review)]

Attention is currently required from: Angel Pons, Christian Walter, Erik van den Bogaert, Frans Hendriks, Jeremy Soller, Jonathon Hall, Michael Niewöhner, Michał Żygowski, Nicholas Sudsgaard, Nick Vaccaro, Nico Huber, Patrick Rudolph, Piotr Król, Sean Rhodes, Subrata Banik, Tim Crawford, Werner Zeh.

Felix Singer has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/79935?usp=email )

Change subject: mainboard: Drop redundant PciRpEnable from devicetrees
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Patch Set 4:

(1 comment)

Patchset:

PS4: 
The patch still needs to be splitted up into the patches for each platform. Please provide a single command for each platform in order to make that reproducible. Could be done with find and sed.

Also, I would like to make sure that the devicetree configuration matches the configuration of the options. The devicetree reference names should help with that, but the conversion is still WIP for Skylake and Cannonlake.