Change in coreboot[master]: lib/spd: Do not print part number if it is not available

[Werner Zeh (Code Review)]

Attention is currently required from: Subrata Banik, Paul Menzel, Angel Pons, Arthur Heymans.
Werner Zeh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62699 )

Change subject: lib/spd: Do not print part number if it is not available
......................................................................

Patch Set 4:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/62699/comment/41094cf5_877116e1 
PS4, Line 11:
> Can we please capture the output in the commit msg as well? (incase spd[DDR4_SPD_PART_OFF] == 0), wi […]

I do not see why displaying "unknown" will add value or more information to the log. Therefore, if there is no number available in the SPD data (spd[DDR4_SPD_PART_OFF] == 0) , the complete line will simply be dropped from the log (with this patch applied).

Until now, the log output looks like:

'[INFO ]  SPD: module part number is '

which is, IMHO, not helpful at all and just leads to confusion.