qemu: Format targetModel for serial devices
qemu: Format targetModel for serial devices

Now that we've created a distinction between target type and target
model, with the latter being the concrete device name, it's time to
switch to formatting the model instead of the type.

Signed-off-by: Andrea Bolognani <3ada0bee826c753786fdbba72243dfba997094cf@redhat.com>
Reviewed-by: Pavel Hrdina <d4772d05997b8abf035041e3b4f4996380ea7e7a@redhat.com>

crobinso/libvirt,zippy2/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,olafhering/libvirt,libvirt/libvirt,jardasgit/libvirt,jardasgit/libvirt,libvirt/libvirt,jfehlig/libvirt,andreabolognani/libvirt,zippy2/libvirt,andreabolognani/libvirt,jfehlig/libvirt,jardasgit/libvirt,eskultety/libvirt,zippy2/libvirt,eskultety/libvirt,fabianfreyer/libvirt,eskultety/libvirt,crobinso/libvirt,nertpinx/libvirt,olafhering/libvirt,crobinso/libvirt,libvirt/libvirt,zippy2/libvirt,libvirt/libvirt,nertpinx/libvirt,andreabolognani/libvirt,olafhering/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,eskultety/libvirt,andreabolognani/libvirt,nertpinx/libvirt,crobinso/libvirt,andreabolognani/libvirt,olafhering/libvirt,jfehlig/libvirt,jardasgit/libvirt,eskultety/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,jardasgit/libvirt