Merge tag 'vfio-ccw-20190425' of...

Merge tag 'vfio-ccw-20190425' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/vfio-ccw into features

Pull vfio-ccw from Cornelia Huck with the following changes:

 - support for sending halt/clear requests to the device

 - various bug fixes