Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20150316' into staging

Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20150316' into staging

Final batch of s390x enhancements/fixes for 2.3:
- handle TOD clock during migration
- CPACF key wrap options
- limit amount of pci device code we build
- ensure big endian accesses for ccws
- various fixes and cleanups

# gpg: Signature made Mon Mar 16 10:01:44 2015 GMT using RSA key ID C6F02FAF
# gpg: Good signature from "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"

* remotes/cohuck/tags/s390x-20150316:
  s390x/config: Do not include full pci.mak
  s390x/pci: fix length in sei_nt2 event
  s390x/ipl: remove dead code
  s390x/virtio-bus: Remove unused function s390_virtio_bus_console()
  s390x: CPACF: Handle key wrap machine options
  s390x/kvm: make use of generic vm attribute check
  kvm: encapsulate HAS_DEVICE for vm attrs
  virtio-ccw: assure BE accesses
  s390x/kvm: Guest Migration TOD clock synchronization
  s390x: Replace unchecked qdev_init() by qdev_init_nofail()

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