qemuDomainDetachChrDevice: Fix chardev hot-unplug
qemuDomainDetachChrDevice: Fix chardev hot-unplug

Not every chardev is plugged onto virtio-serial bus. However, the
code introduced in 89e991a2aa36b04 assumes that. Incorrectly.
With previous patches we have three options where a chardev can
be plugged: virtio-serial, USB and PCI. This commit fixes the
detach part. However, since we are not auto allocating USB
addresses yet, I'm just marking the place where appropriate code
should go.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

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