Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20181004' into staging

Various s390x updates:
- fix several struct definitions so that sparc hosts do not trip over
  unaligned accesses
- fence enabling huge pages for pre-3.1 machines
- sysbus init -> realize conversion
- fixes and improvements in tcg (instruction flags and AFP registers)

# gpg: Signature made Thu 04 Oct 2018 16:22:20 BST
# gpg:                using RSA key DECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>"
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>"
# gpg:                 aka "Cornelia Huck <cohuck@redhat.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20181004:
  hw/s390x/s390-pci-bus: Convert sysbus init function to realize function
  s390x/tcg: refactor specification checking
  s390x/tcg: fix FP register pair checks
  s390x/tcg: handle privileged instructions via flags
  s390x/tcg: check for AFP-register, BFP and DFP data exceptions
  s390x/tcg: add instruction flags for floating point instructions
  s390x/tcg: support flags for instructions
  s390x/tcg: store in the TB flags if AFP is enabled
  s390x/tcg: factor out and fix DATA exception injection
  s390x: move tcg_s390_program_interrupt() into TCG code and mark it noreturn
  target/s390x: exception on non-aligned LPSW(E)
  s390x: Fence huge pages prior to 3.1
  hw/s390x/ioinst: Fix alignment problem in struct SubchDev
  hw/s390x/css: Remove QEMU_PACKED from struct SenseId
  hw/s390x/ipl: Fix alignment problems of S390IPLState members

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