boards: Add Scarlet

This patch adds the Scarlet board to get proper image scaling.

BRANCH=none
BUG=none
TEST=Added debug statements to libpayload to confirm no SW scaling.

Change-Id: I7753bd46098c1f1ae932cbc7937fa6038938ac80
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/826702
Reviewed-by: Philip Chen <philipchen@chromium.org>
1 file changed