[coreboot-gerrit] Change in coreboot[master]: nb/amd/agesa: define DDR3_SPD_SIZE as a common value

[Angel Pons (Code Review)]

Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/44498 )

Change subject: nb/amd/agesa: define DDR3_SPD_SIZE as a common value
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Patch Set 1: Code-Review+1

(1 comment)

https://review.coreboot.org/c/coreboot/+/44498/1//COMMIT_MSG 
Commit Message:

https://review.coreboot.org/c/coreboot/+/44498/1//COMMIT_MSG@9 
PS1, Line 9: Move a size of DDR3 SPD memory (always 256 bytes) to a common define.
I think there's more instances of `256` elsewhere?