firmware: fixing menu artifacts during printing

BUG=chrome-os-partner:61275
BRANCH=None
TEST=reboot and switch menus and make sure everything
     is printing out properly.

Change-Id: I1269d3dc762a66dde0203673b7b400aba92afa75
Signed-off-by: Shelley Chen <shchen@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/424356
Reviewed-by: Randall Spangler <rspangler@chromium.org>
1 file changed