Change in coreboot[master]: cpu/x86/smm: Add smm_board_info for SMM that can be set from mainboard

[Arthur Heymans (Code Review)]

Attention is currently required from: Marc Jones, Patrick Rudolph, Johnny Lin, Rocky Phagura, Jingle Hsu, Angel Pons, Morgan Jang, Kyösti Mälkki.
Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/49460 )

Change subject: cpu/x86/smm: Add smm_board_info for SMM that can be set from mainboard
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Patch Set 16:

(2 comments)

Patchset:

PS16: 
Don't think setting the console level

File src/include/cpu/x86/smm.h:

https://review.coreboot.org/c/coreboot/+/49460/comment/1d48bb51_71ad8dc5 
PS16, Line 65: u32 smm_board_info;
why not add what you need here explicitly: uart and console loglevel, guarded by DEBUG_SMI?