Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.6-20160225' into staging

ppc patch queue for 2016-02-25

Hopefully final queue before qemu-2.6 soft freeze.  Currently
accumulated patches for target-ppc, pseries machine type and related
devices:
    * SLOF firmware update
        - Many new features, including virtio 1.0 non-legacy support
    * H_PAGE_INIT hypercall implementation
    * Small cleanups and bugfixes.

# gpg: Signature made Thu 25 Feb 2016 03:00:56 GMT using RSA key ID 20D9B392
# 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: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.6-20160225:
  ppc/kvm: Tell the user what might be wrong when using bad CPU types with kvm-hv
  ppc/kvm: Use error_report() instead of cpu_abort() for user-triggerable errors
  spapr: initialize local Error pointer
  hw/ppc/spapr: Implement the h_page_init hypercall
  pseries: Update SLOF firmware image to 20160223

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