Summary for me:
I have to wait that all missing parts, (USB3, cpuidle, ...) are done
upstream (Kernel) when I want to use Fedora on Odroid XU4 or Odroid HC1
(I've tested Fedora 27 beta on it ) or I have to use Ubuntu.
Thanks for the clarification of fact by Peter.
I want to provide help to the cummunity where I can.