Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20190709' into staging

Fixes in cpu models, tcg, and vfio-ccw.

# gpg: Signature made Tue 09 Jul 2019 13:20:52 BST
# gpg:                using RSA key C3D0D66DC3624FF6A8C018CEDECF6B93C6F02FAF
# gpg:                issuer "[email protected]"
# gpg: Good signature from "Cornelia Huck <[email protected]>" [unknown]
# gpg:                 aka "Cornelia Huck <[email protected]>" [full]
# gpg:                 aka "Cornelia Huck <[email protected]>" [full]
# gpg:                 aka "Cornelia Huck <[email protected]>" [unknown]
# gpg:                 aka "Cornelia Huck <[email protected]>" [unknown]
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20190709:
  s390x/tcg: move fallthrough annotation
  s390: cpumodel: fix description for the new vector facility
  s390x/cpumodel: Set up CPU model for AQIC interception
  vfio-ccw: Test vfio_set_irq_signaling() return value

Signed-off-by: Peter Maydell <[email protected]>