Merge branch 's390-for-upstream' of git://github.com/agraf/qemu

* 's390-for-upstream' of git://github.com/agraf/qemu:
  s390/virtio-ccw: remove redundant call to blockdev_mark_auto_del
  s390/css: Fix subchannel detection
  Allow virtio-net features for legacy s390 virtio bus
  s390: virtio-ccw maintainer
  s390: simplify kvm cpu init