ctcm passes an intparm when calling ccw_device_*(), even though
ctcm_irq_handler() later makes no use of this.

To reduce the confusion, consistently pass 0 as intparm instead.
Signed-off-by: NJulian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: NSebastian Ott <sebott@linux.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>