claw: A claw device is a group of just 2 ccw devices

When creating a claw device, just 2 subchannels have to be grouped.
Signed-off-by: NUrsula Braun <ursula.braun@de.ibm.com>
Signed-off-by: NFrank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/s390/net/claw.c

@@ -295,7 +295,7 @@ claw_driver_group_store(struct device_driver *ddrv, const char *buf,
 	int err;
 	err = ccwgroup_create_from_string(claw_root_dev,
 					  claw_group_driver.driver_id,
-					  &claw_ccw_driver, 3, buf);
+					  &claw_ccw_driver, 2, buf);
 	return err ? err : count;
 }