This thread in Linux Audio User seems to indicate that the firewire interface is now part of ALSA in the 4.x kernels:

http://lists.linuxaudio.org/pipermail/linux-audio-user/2015-August/102281.html

-- Jeff

I'm not sure if it got taken out, or we just missed it, but ffado (already
in the repos) isn't in the list of packages for the audio group install,
nor was it installed on my system after fedup from the 21 JamĀ  spin. (I
think that's what I did, and not a clean install) but FFADO wasn' t
installed already.

Not sure if this is the best place for this, or if I should file a bug
report. Let me know if the latter is better. =)