[coreboot-gerrit] Change in coreboot[master]: nb/intel/{gm45, i945, pineview}: Use macro instead of GGC address

[Elyes HAOUAS (Code Review)]

Elyes HAOUAS has posted comments on this change. ( https://review.coreboot.org/28909 )

Change subject: nb/intel/{gm45,i945,pineview}: Use macro instead of GGC address
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Patch Set 2:
> (1 comment)

regarding the datasheet, it is 16bits.

by the way, there is a conflict with this change : https://review.coreboot.org/#/c/coreboot/+/17645/
so maybe I have to keep only changes related to pineview and i945.