Patrick Rudolph has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/32293 )
Change subject: smbios: Add memory type 9 system slot support ......................................................................
Patch Set 1:
Added some fields to sconfig: https://review.coreboot.org/c/coreboot/+/32307/1 Tested on Lenovo T520 using https://review.coreboot.org/c/coreboot/+/32309/1. The slots are correctly listed in dmidecode -t9.