Comment # 5 on bug 1150408 from Andreas F�rber

Guillaume, this broke my 3B, too: I suspect your %preun, which you didn't
discuss with me or anyone else on the mailing list. Updates used to work just
fine here.

Maybe it should've been %postun instead of %preun?

However, even after extracting the latest hardware:boot .rpm's files back onto
the partition, TF-A is no longer booting for me, it executes BL1 but gets stuck
at "INFO:    BL1: Loading BL2". I guess a blob regression in
raspberrypi-firmware package in addition to the cp/rm problems.