libftdi/libftdi should support multilib. This, in turn, would allow other packages that depend on libftdi to be multilib.
I can do this if you're desperate but embedded@ is a "quiet" project. You're very welcome to do it and then ping me if you want a review, or just commit it.
The blocker bug 620310 is obsolete & closed now, so let's close this for now unless it's needed for something else.