poppy: Disable arrow keys for language switch

Previously, could use arrow keys to change language
in fw screen.  Disabling this in detachable menu
because will be using menu to switch languages.

BUG=b:35585623
BRANCH=None
TEST=reboot and try to use right/left arrows.  Make
     sure they don't do anything.

Change-Id: Ic720ea4ec9e6b7ae1676fdf60d27e2c74e48f736
Signed-off-by: Shelley Chen <shchen@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/444945
Reviewed-by: Randall Spangler <rspangler@chromium.org>
1 file changed