vendorcode/amd/agesa/f15?tn: Reduce useless differences

Reduce inconsequential differences between fam15 and
fam15tn to better prepare for possible merger.

Change-Id: I016aa1a4cc45553d51190988d48c8a54cfd85f5a
Signed-off-by: Sara Lelliott <sara@jupitercrash.org>
Reviewed-on: http://review.coreboot.org/7503
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
114 files changed