veyron_mighty: Adapt to latest changes

Port over a few recent changes that were uploaded before the Mighty
board landed.

BRANCH=None
BUG=None
TEST=Booted on a Pinky rev2, went as far as you'd expect.

Change-Id: I546dbc41ccd191159e96b851424fcb37902a57ec
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/231691
3 files changed