[S] Change in coreboot[master]: cpu/x86/mp_init.c: Use existing code to create cpu struct device

[Angel Pons (Code Review)]

Attention is currently required from: Arthur Heymans, Kyösti Mälkki.

Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/64341 )

Change subject: cpu/x86/mp_init.c: Use existing code to create cpu struct device
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Patch Set 5: Code-Review+2

(2 comments)

Patchset:

PS5: 
If a CPU device exists but isn't enabled, using `add_cpu_device()` will enable it. Is this a problem?

File src/cpu/x86/mp_init.c:

https://review.coreboot.org/c/coreboot/+/64341/comment/0f2e4704_cd6186cf 
PS5, Line 374: 						    1);
Ow, this hurts to look at