[coreboot-gerrit] Change in coreboot[master]: CBMEM: Clarify CBMEM_TOP_BACKUP function usage

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/19377 )

Change subject: CBMEM: Clarify CBMEM_TOP_BACKUP function usage
......................................................................

Patch Set 7:

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/10128/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/54405/ : SUCCESS