minnowboard: use ip=dhcp for every boot methods

Do not specify the device to use.

Signed-off-by: Rémi Duraffort <remi.duraffort@linaro.org>
15 jobs for base-grub in 16 minutes and 47 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Test
passed #99498
amd64
dispatcher-debian-10

00:02:23

passed #99500
amd64
dispatcher-debian-11

00:02:47

passed #99499
amd64
server-debian-10

00:02:49

passed #99501
amd64
server-debian-11

00:04:56

 
  Analyze
passed #99503
amd64
black

00:00:50

passed #99504
amd64
code_quality

00:00:28

passed #99505
amd64
coverage

00:06:43

59.23%
passed #99506
amd64
dockerfiles

00:00:25

passed #99508
amd64
pylint

00:03:08

passed #99502
amd64-dind
sast

00:02:26

passed #99507
amd64
schemas

00:00:39

 
  Build
passed #99510
amd64
debian/10

00:01:24

passed #99509
amd64
doc

00:00:48

passed #99511
amd64-dind
docker-amd64-dispatcher

00:03:47

passed #99512
amd64-dind
docker-amd64-server

00:05:02