Merge tag 'vfio-ccw-20200603-v2' of https://git.kernel.org/pub/scm/linux/kernel/git...

vfio-ccw updates:
- accept requests without the prefetch bit set
- enable path handling via two new regions

* tag 'vfio-ccw-20200603-v2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/vfio-ccw:
  vfio-ccw: Add trace for CRW event
  vfio-ccw: Wire up the CRW irq and CRW region
  vfio-ccw: Introduce a new CRW region
  vfio-ccw: Refactor IRQ handlers
  vfio-ccw: Introduce a new schib region
  vfio-ccw: Refactor the unregister of the async regions
  vfio-ccw: Register a chp_event callback for vfio-ccw
  vfio-ccw: Introduce new helper functions to free/destroy regions
  vfio-ccw: document possible errors
  vfio-ccw: Enable transparent CCW IPL from DASD

Link: https://lkml.kernel.org/r/20200603112716.332801-1-cohuck@redhat.com
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>