Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20190403' into staging

Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20190403' into staging

Fix taking address of fields in packed structs warnings
by gcc 9

# gpg: Signature made Wed 03 Apr 2019 10:58:42 BST
# gpg:                using RSA key C3D0D66DC3624FF6A8C018CEDECF6B93C6F02FAF
# gpg:                issuer "cohuck@redhat.com"
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>" [unknown]
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>" [full]
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>" [full]
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>" [unknown]
# gpg:                 aka "Cornelia Huck <cohuck@redhat.com>" [unknown]
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20190403:
  hw/s390x/3270-ccw: avoid taking address of fields in packed struct
  hw/s390x/ipl: avoid taking address of fields in packed struct
  hw/s390/css: avoid taking address members in packed structs
  hw/vfio/ccw: avoid taking address members in packed structs

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