Change in coreboot[master]: soc/intel/xeon_sp/cpx: Allow creating meminfo for empty DIMM slots

[Johnny Lin (Code Review)]

Attention is currently required from: Anjaneya "Reddy" Chagam, Jonathan Zhang, Christian Walter, Angel Pons, Arthur Heymans, Tim Chu.
Johnny Lin has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/64036 )

Change subject: soc/intel/xeon_sp/cpx: Allow creating meminfo for empty DIMM slots
......................................................................

Patch Set 1:

(2 comments)

File src/soc/intel/xeon_sp/cpx/romstage.c:

https://review.coreboot.org/c/coreboot/+/64036/comment/d8ee80a6_cc4fb8c0 
PS1, Line 151: DIMM
DIMM slots

https://review.coreboot.org/c/coreboot/+/64036/comment/48e72a95_e189a8ba 
PS1, Line 153: DIMMs
DIMM slots, or if we want to print the installed DIMM numbers will need to add a counter for it, I think the latter is more ideal.