MAINTAINERS: Add vfio-ccw maintainer

Add Cornelia Huck as the vfio-ccw maintainer.

Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Message-Id: <20170517004813.58227-14-bjsdjshi@linux.vnet.ibm.com>
[CH: add tree]
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

MAINTAINERS

@@ -1005,6 +1005,14 @@ S: Supported
 F: hw/vfio/*
 F: include/hw/vfio/
 
+vfio-ccw
+M: Cornelia Huck <cornelia.huck@de.ibm.com>
+S: Supported
+F: hw/vfio/ccw.c
+F: hw/s390x/s390-ccw.c
+F: include/hw/s390x/s390-ccw.h
+T: git git://github.com/cohuck/qemu.git s390-next
+
 vhost
 M: Michael S. Tsirkin <mst@redhat.com>
 S: Supported