Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-3.0-20180618' into staging

ppc patch queue 2018-06-18

Next batch of ppc and spapr related patches for the 3.0 release.
    * Improved handling of Spectre/Meltdown mitigations for POWER8
    * Numerous Mac machine type cleanups and improvements
    * Cleanup to cpu realize/unrealize path for spapr
    * Create a place for machine-specific per-cpu information, and
      start moving some things to it
    * Assorted bugfixes

# gpg: Signature made Mon 18 Jun 2018 04:52:37 BST
# gpg:                using RSA key 6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-3.0-20180618: (28 commits)
  spapr: fix xics_system_init() error path
  target/ppc, spapr: Move VPA information to machine_data
  ppc/pnv: introduce a pnv_chip_core_realize() routine
  spapr_cpu_core: introduce spapr_create_vcpu()
  spapr_cpu_core: add missing rollback on realization path
  spapr_cpu_core: fix potential leak in spapr_cpu_core_realize()
  spapr_cpu_core: convert last snprintf() to g_strdup_printf()
  pnv: Add cpu unrealize path
  pnv: Clean up cpu realize path
  pnv_core: Allocate cpu thread objects individually
  pnv: Fix some error handling cpu realize()
  spapr: Clean up cpu realize/unrealize paths
  sm501: Do not clear read only bits when writing registers
  mos6522: expose mos6522_update_irq() through MOS6522DeviceClass
  mos6522: remove additional interrupt flag filter from mos6522_update_irq()
  mos6522: only clear the shift register interrupt upon write
  xics_kvm: fix a build break
  mac_newworld: add PMU device
  adb: add property to disable direct reg 3 writes
  adb: fix read reg 3 byte ordering
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>