defaultenv-2: init: don't call timeout again if the user intervened
With autoboot_timeout=0 the second 'timeout' might not get another
character even if the user keeps a key pressed. So just reuse the key from
the first call.
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>