Display the petitboot UI instead of a login prompt, allowing the
configuration of custom tty(s) as we do for the login prompt.
petitboot already depends on udev, so let's use it instead of rcS to
launch pb-console. This has the advantage of easily wildcarding the list
of ttys ("hvc*") and enables hotplug devices ("ttyUSB0").
Signed-off-by: Reza Arbab <arbab@linux.ibm.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>