mb/google/guybrush: Add APCB to get through memory training

BUG=b:182850520
TEST=guybrush boots to coreboot

Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Signed-off-by: Mathew King <mathewk@chromium.org>
Original-Change-Id: Idf60ae8de584182d01397b60afe3a9a1e99106f3
Change-Id: I5a9de63b4b54ae444568e1637fbaf84ccb1d0117
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/blobs/+/2774804
Reviewed-by: Mathew King <mathewk@chromium.org>
Tested-by: Mathew King <mathewk@chromium.org>
Commit-Queue: Martin Roth <martinroth@google.com>
Auto-Submit: Martin Roth <martinroth@google.com>
2 files changed