Enter key at DEV screen no longer transition to TONORM screen

And space at TONORM screen no longer confirms disabling dev mode

Added Ctrl+Refresh as an alias for tonorm screen request.  U-boot will
need to be enhanced to support that.  Until then, many FAFT tests will
break.

BUG=chrome-os-partner:11887
TEST=manual

1. Boot to DEV screen
2. Press Enter.  Nothing happens.
3. Press Space.  Goes to TONORM screen.
4. Press Space.  Nothing happens.
5. Press Enter.  Reboots with dev mode disabled.

Change-Id: I7f61c4001c668ac916f50f931a79a107752c83b5
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/28851
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
2 files changed