qemu_conf: Use more of VIR_AUTOFREE()
qemu_conf: Use more of VIR_AUTOFREE()

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>
Reviewed-by: Daniel Henrique Barboza <627b089ad62deae9aaf06ccfa2c9056df28927e0@gmail.com>

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