Don’t know if this will help you but with all the troubleshooting that I did, I finally found my fix:
As a workaround I used the following cmdline options:
radeon.cik_support=0 radeon.si_support=0 amdgpu.si_support=1 amdgpu.cik_support=1
Edit your grub menu to get into the desktop and then
Add these options to your GRUB_CMDLINE_LINUX_DEFAULT that you find in /etc/default/grub and then run ‘grub2-mkconfig -o /boot/grub2/grub.cfg’ afterwards to update /boot/grub2/grub.cfg.