[PATCH] ACPI/backlight: Force backlight native for Clevo NL5xRU and

[Werner Sembach]

This patch works around a bug appearing on at least two Clevo devices.
I also put some effort in finding the root cause for this bug to fix it in
general: https://bugzilla.kernel.org/show_bug.cgi?id=215683
I could pinpoint it down where it happens, but could use some ideas for
cleanly fixing it.