Up until v2.11.0-rc2~19^2~3 QEMU used to require at least one
NUMA node to be configured when memory hotplug was enabled. After
that commit, QEMU automatically adds a NUMA node if none was
specified on the cmd line. Reflect this in domain XML, i.e.
explicitly add a NUMA node into our domain definition if needed.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
---
 src/qemu/qemu_domain.c                        | 53 ++++++++++++++++++-
 ...emory-hotplug-ppc64-nonuma-abi-update.args | 11 ++--
 ...memory-hotplug-ppc64-nonuma-abi-update.xml |  7 ++-
 3 files changed, 63 insertions(+), 8 deletions(-)