ppc patch queue 2021-01-19 Next pull request for qemu-6.0. Not a huge amount here, but it does have some important fixes from Greg Kurz. Includes: * A number of minor cleanups from Daniel Barboza (preliminaries for some hotplug changes that are still under review) * Improved handling of memory hotplug from Greg Kurz * A number of fixes for sam460ex and other 440 based platforms from Zolan Balaton * Some fixes for the QOMification of the PPC 4xx UIC interrupt controller from Peter Maydell