Comment 0 for bug 1845572

This will cause the installer to exit early, causing a kernel panic before any prompt to the user. This is restricted to some Power systems.

[Test case]
A build vmlinux was used to boot the installer, and a prompt was available.
'add' was written to /sys/devices/vio/uevent was written to, and no error was found.
'add' was written to /sys/devices/vio/*/uevent, and modalias information was found when 'udevadm monitor -p' was run in the background.

[Regression potential]
Events may be missing and coldplug/hotplug of vio devices may fail. That was tested in the test case and not found to be the case.