[S] Change in coreboot[master]: cpu/amd/pi00730F01: Use common code for mp_init

[Arthur Heymans (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Michał Żygowski, Marshall Dawson, Matt DeVillier, Angel Pons, Fred Reitberger, Felix Held.

Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/64891 )

Change subject: cpu/amd/pi00730F01: Use common code for mp_init
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Patch Set 25:

(1 comment)

Patchset:

PS24:
> The coreboot 4.18 release is slated to happen ~now, so if this hasn't been tested it would be best to wait until the release is done. In the meantime, 3mdeb can test it if they want.

The only functional change is that no MTRR is used for > 4G if a certain bit is set which is common for all AMD hardware. Other than that the code does exactly the same. I don't think this needs more testing. I also need the non smm code for a different project. It seems silly to split off those 3 loc in a different CL.