Change in coreboot[master]: [WIP]cpu/x86/smm: Support PARALLEL_MP with SMM_ASEG

[Kyösti Mälkki (Code Review)]

Attention is currently required from: Arthur Heymans.
Kyösti Mälkki has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58700 )

Change subject: [WIP]cpu/x86/smm: Support PARALLEL_MP with SMM_ASEG
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Patch Set 2:

(2 comments)

File src/cpu/x86/smm/smm_module_loader.c:

https://review.coreboot.org/c/coreboot/+/58700/comment/7df0e42d_e9658725 
PS2, Line 613:  * |    stub code    | <- cpu3, etc
Is MAX_CPUS=4 correct, remove ", etc"

https://review.coreboot.org/c/coreboot/+/58700/comment/8a3d430e_f79b617e 
PS2, Line 619:  */
Patchset #1, #2 have stuff leaking below 0xa0000.

Installing permanent SMM handler to 0x000a0000
smm_create_map: cpus allowed in one segment 62
smm_create_map: min # of segments needed 1
CPU 0x0
    smbase a0000  entry a8000
           ss_start afe00  code_end a81e0
CPU 0x1
    smbase 9fe00  entry a7e00
           ss_start afc00  code_end a7fe0