Change in coreboot[master]: include/memory_info.h: Change serial number field from 5 bytes to 4

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/25343 )

Change subject: include/memory_info.h: Change serial number field from 5 bytes to 4
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Patch Set 3:

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/69255/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/23603/ : SUCCESS