vboot: Don't warn user if enter key is pressed if rec switch is physical

When the recovery switch is physical then the propmt to enter dev mode
will say to press the recovery switch not the enter key. In this case we
do not want to warn the user that an internal keyboard is needed to
confirm we will just silently ignore the enter key.

BUG=b:144034020
TEST=On Drallion enter key does not work to switch to dev mode and does
     not beep or print a warning when the enter key is pressed
BRANCH=none

Change-Id: I250ea2622c9c38bfc0d7463eb95ca65a12b41153
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1929601
Tested-by: Mathew King <mathewk@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Commit-Queue: Mathew King <mathewk@chromium.org>
1 file changed