Error out on an address for isa-serial in QEMU driver.
Error out on an address for isa-serial in QEMU driver.

We've never formatted them on the qemu command line.

https://bugzilla.redhat.com/show_bug.cgi?id=1164053

crobinso/libvirt,jardasgit/libvirt,nertpinx/libvirt,eskultety/libvirt,eskultety/libvirt,VenkatDatta/libvirt,rlaager/libvirt,agx/libvirt,agx/libvirt,taget/libvirt,jardasgit/libvirt,zippy2/libvirt,rlaager/libvirt,nertpinx/libvirt,crobinso/libvirt,eskultety/libvirt,datto/libvirt,VenkatDatta/libvirt,taget/libvirt,fabianfreyer/libvirt,datto/libvirt,nertpinx/libvirt,datto/libvirt,andreabolognani/libvirt,crobinso/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,crobinso/libvirt,datto/libvirt,libvirt/libvirt,nertpinx/libvirt,olafhering/libvirt,zippy2/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,jardasgit/libvirt,jfehlig/libvirt,olafhering/libvirt,zippy2/libvirt,VenkatDatta/libvirt,libvirt/libvirt,taget/libvirt,VenkatDatta/libvirt,taget/libvirt,andreabolognani/libvirt,eskultety/libvirt,libvirt/libvirt,zippy2/libvirt,agx/libvirt,jfehlig/libvirt,datto/libvirt,agx/libvirt,jfehlig/libvirt,jfehlig/libvirt,andreabolognani/libvirt,rlaager/libvirt,rlaager/libvirt,nertpinx/libvirt,libvirt/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,agx/libvirt,olafhering/libvirt,jardasgit/libvirt,taget/libvirt,olafhering/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,eskultety/libvirt,rlaager/libvirt