qeth: no write permission for readonly sysattr

User is not allowed to write into bridge_state sysfs file.
Fixed attribute not mislead the user
Signed-off-by: NLakhvich Dmitriy <ldmitriy@ru.ibm.com>
Signed-off-by: NUrsula Braun <ursula.braun@de.ibm.com>
Reported-by: NPeter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reviewed-by: NEugene Crosser <Eugene.Crosser@ru.ibm.com>
Reviewed-by: NThomas Richter <tmricht@de.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/s390/net/qeth_l2_sys.c

@@ -109,7 +109,7 @@ static ssize_t qeth_bridge_port_state_show(struct device *dev,
 	return qeth_bridge_port_role_state_show(dev, attr, buf, 1);
 }
 
-static DEVICE_ATTR(bridge_state, 0644, qeth_bridge_port_state_show,
+static DEVICE_ATTR(bridge_state, 0444, qeth_bridge_port_state_show,
 		   NULL);
 
 static ssize_t qeth_bridgeport_hostnotification_show(struct device *dev,