Fedo34 tries to build kernel module, but cannot finish.
the broken kernel is
linux /vmlinuz-5.12.7-300.fc34.x86_64
while
linux /vmlinuz-5.12.5-300.fc34.x86_64
worked like a charm.
Generally speaking, the binary AMD drivers are not really used anymore. DKMS failures to build after a kernel update typically need to be reported and tracked with whoever provided the kernel driver that dkms is trying to build though. It is never Fedora. Packaging kernel modules outside of mainline is against Fedora policy, and falls to 3rd party repositories to maintain.