[S] Change in coreboot[master]: cpu/intel/socket_*: Clean up Kconfig files

[Angel Pons (Code Review)]

Attention is currently required from: Stefan Ott, Nico Huber, Arthur Heymans, Kyösti Mälkki, Alexander Couzens, Elyes Haouas.

Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69447 )

Change subject: cpu/intel/socket_*: Clean up Kconfig files
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Patch Set 4:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/69447/comment/871c8455_72b8c434 
PS3, Line 10: Move MAX_CPUS to mainboards.
> > The problem with having the defaults for `MAX_CPUS` in `cpu/intel/model_*/Kconfig` is that sockets […]

Arthur, the Atom 330 is dual-core, has Hyper-Threading and is paired with the i945 northbridge, which is why `MAX_CPUS` is 4 for i945. See the commit message of CB:41845 and https://www.intel.com/content/www/us/en/products/sku/35641/intel-atom-proces...