qemu: Don't set address type too early during virtio disk hotplug
qemu: Don't set address type too early during virtio disk hotplug

f946462e14ac036357b7c11ce5c23f94a3ee4e49 changed behavior by settings
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI upfront. If we do so before invoking
qemuDomainPCIAddressEnsureAddr we merely try to set the PCI slot via
qemuDomainPCIAddressReserveSlot instead reserving a new address via
qemuDomainPCIAddressSetNextAddr which fails with

$ ~/run-tck-test domain/200-disk-hotplug.t
./scripts/domain/200-disk-hotplug.t .. # Creating a new transient domain
./scripts/domain/200-disk-hotplug.t .. 1/5 # Attaching the new disk /var/lib/jenkins/jobs/libvirt-tck-build/workspace/scratchdir/200-disk-hotplug/extra.img

 #   Failed test 'disk has been attached'
 #   at ./scripts/domain/200-disk-hotplug.t line 67.
 # died: Sys::Virt::Error (libvirt error code: 1, message: internal error unable to reserve PCI address 0:0:0.0
 # )

crobinso/libvirt,elmarco/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,zhlcindy/libvirt-1.1.4-maintain,rlaager/libvirt,cbosdo/libvirt,olafhering/libvirt,crobinso/libvirt,agx/libvirt,nertpinx/libvirt,libvirt/libvirt,elmarco/libvirt,olafhering/libvirt,VenkatDatta/libvirt,datto/libvirt,shugaoye/libvirt,agx/libvirt,VenkatDatta/libvirt,zippy2/libvirt,cbosdo/libvirt,datto/libvirt,eskultety/libvirt,jardasgit/libvirt,shugaoye/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,rlaager/libvirt,jardasgit/libvirt,agx/libvirt,jfehlig/libvirt,shugaoye/libvirt,andreabolognani/libvirt,rlaager/libvirt,taget/libvirt,taget/libvirt,taget/libvirt,taget/libvirt,elmarco/libvirt,elmarco/libvirt,datto/libvirt,eskultety/libvirt,nertpinx/libvirt,jfehlig/libvirt,zippy2/libvirt,jfehlig/libvirt,zhlcindy/libvirt-1.1.4-maintain,cbosdo/libvirt,nertpinx/libvirt,eskultety/libvirt,olafhering/libvirt,VenkatDatta/libvirt,zippy2/libvirt,zhlcindy/libvirt-1.1.4-maintain,rlaager/libvirt,zippy2/libvirt,cbosdo/libvirt,datto/libvirt,jardasgit/libvirt,eskultety/libvirt,fabianfreyer/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,taget/libvirt,andreabolognani/libvirt,agx/libvirt,andreabolognani/libvirt,olafhering/libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,nertpinx/libvirt,fabianfreyer/libvirt,eskultety/libvirt,zhlcindy/libvirt-1.1.4-maintain,agx/libvirt,elmarco/libvirt,crobinso/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,cbosdo/libvirt,rlaager/libvirt,libvirt/libvirt,andreabolognani/libvirt,libvirt/libvirt,libvirt/libvirt,crobinso/libvirt,datto/libvirt,nertpinx/libvirt,andreabolognani/libvirt