Board changes in rev6+ have a fix to VDDQ that should fix the issue
that was being seen with this SKU, so only lower the memory speed on
older boards.
BUG=b:37172778
TEST=memory stress testing on rev6 boards
Change-Id: I6d6fe730cabd74af23eab3f02feef9da01a35fd4
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/20429
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
dea94abebb