[S390] cio: fix incorrect ccw_device_init_count

If device recognition is interrupted by a subchannel event
indicating that the device is gone, ccw_device_init_count
is not correctly decreased.

Fix this by reporting the corresponding event to the device
recognition callback via the state machine.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>