Add Kontron sl28 boards.

Add device types for the following boards:
 - KBox A-230-LS
 - SMARC-sAL28 on Evaluation Carrier 2.0

Signed-off-by: Michael Walle <michael@walle.cc>
17 jobs for feature-sl28-boards in 18 minutes and 7 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Test
passed #116131
amd64
dispatcher-debian-10

00:02:47

passed #116133
amd64
dispatcher-debian-11

00:03:25

passed #116132
amd64
server-debian-10

00:03:47

passed #116134
amd64
server-debian-11

00:06:11

 
  Analyze
passed #116135
amd64-dind
bandit-sast

00:00:58

passed #116136
amd64
black

00:00:50

passed #116137
amd64
code_quality

00:00:29

passed #116142
amd64
codespell

00:00:25

passed #116138
amd64
coverage

00:06:58

60.88%
passed #116139
amd64
dockerfiles

00:00:23

passed #116141
amd64
pylint

00:03:11

passed #116140
amd64
schemas

00:00:37

 
  Build
passed #116144
amd64
debian/10

00:01:46

passed #116143
amd64
doc

00:00:43

passed #116215
amd64-dind
docker-amd64-dispatcher

00:01:32

passed #116146
amd64-dind
docker-amd64-server

00:03:05

failed #116145
amd64-dind
docker-amd64-dispatcher

01:00:01