Raven_dmcu.bin can get packed in the initramfs Image if amdgpu is loaded at
boot.  Check the initramfs by running “lsinitcpio /boot/name of initramfs.img”.
 If you see raven_dmcu.bin in the image from the previous command, remove
raven_dmcu.bin from /lib/firmware then run “mkinitcpio -p linux”.