nyan_big: nyan_blaze: Add code to handle more board strappings.

This adds code to handle board strappings for revisions 3-5.

BUG=None
TEST=Built for blaze, booted on big.
BRANCH=None

Change-Id: Ia7c1881c4153bb6d0ed8e70a6fddc6450c891dc0
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/195497
Reviewed-by: Katie Roberts-Hoffman <katierh@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
2 files changed