ppc patch queue 2017-06-06 Accumulated patches for ppc targets and the pseries machine type. The big thing in this batch is a start on a substantial cleanup of the pseries hotplug mechanisms, which were pretty confusing. For now these shouldn't cause substantial behavioural changes, but I am hoping these lead to clearer code and eventually to fixes for the bugs we have in hotplug handling, particularly when hotplug and migration are combined. The remaining patches are mostly bugfixes.