Change in coreboot[master]: cpu/x86/mp_init.c: Fix building with no smihandler

[9elements QA (Code Review)]

9elements QA has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/54754 )

Change subject: cpu/x86/mp_init.c: Fix building with no smihandler
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Patch Set 6:

Automatic boot test returned (PASS/FAIL/TOTAL): 4 / 3 / 7

FAIL: x86_32  "ThinkPad T500" , build config LENOVO_T500 
     and payload SeaBIOS : https://lava.9esec.io/r/83312
FAIL: x86_64  "HP Compaq 8200 Elite SFF PC" , build config HP_COMPAQ_8200_ELITE_SFF_PC.X86_64 
     and payload SeaBIOS : https://lava.9esec.io/r/83310
FAIL: x86_32  "HP Compaq 8200 Elite SFF PC" , build config HP_COMPAQ_8200_ELITE_SFF_PC 
     and payload SeaBIOS : https://lava.9esec.io/r/83309
PASS: x86_32  "QEMU x86 q35/ich9" , build config EMULATION_QEMU_X86_Q35 
     and payload SeaBIOS : https://lava.9esec.io/r/83307
PASS: x86_64  "QEMU x86 i440fx/piix4" , build config EMULATION_QEMU_X86_I440FX_X86_64 
     and payload SeaBIOS : https://lava.9esec.io/r/83306
PASS: x86_32  "QEMU x86 i440fx/piix4" , build config EMULATION_QEMU_X86_I440FX_ 
     and payload SeaBIOS : https://lava.9esec.io/r/83304
PASS: x86_32  "QEMU x86 i440fx/piix4" , build config EMULATION_QEMU_X86_I440FX 
     and payload SeaBIOS : https://lava.9esec.io/r/83303

Please note: This test is under development and might not be accurate at all!