The Leap 15.5 JeOS image fails to boot in openQA for some time now.
Initially it looked to me like an issue with the test infra, but the TW and
15.6 images boot while 15.5 fails consistently.

I tried to reproduce the issue locally and except for a slow boot due to no
ethernet cable it worked. 

The package diff between last working and latest build shows changes in
aaa_base, coreutils, kernel, less, protobuf, libsemanage, perl, rpm and yast.
Could be a kernel issue?

## Observation

openQA test in scenario opensuse-15.5-JeOS-for-RPi-aarch64-jeos@RPi3 fails in
[prepare_firstboot](https://openqa.opensuse.org/tests/4217406/modules/prepare_firstboot/steps/1)

## Test suite description
Maintainer: fvogt, mnowak

Start JeOS from the HDD image, configure it using the firstboot wizard and then
run basic tests. console=tty0 added as needed for aarch64.


## Reproducible

Fails since (at least) Build
[13.183](https://openqa.opensuse.org/tests/4120363)


## Expected result

Last good: [13.182](https://openqa.opensuse.org/tests/4119085) (or more recent)


## Further details

Always latest result in this scenario:
[latest](https://openqa.opensuse.org/tests/latest?arch=aarch64&distri=opensuse&flavor=JeOS-for-RPi&machine=RPi3&test=jeos&version=15.5)