target: Drop config_item_name usage in fabric TFO->free_wwn()

This patch removes config_item_name() informational usage of
TFO->free_wwn() treewide in loopback, tcm_fc, ib_srpt and
tcm_vhost module code.

Using v4 target_core_fabric_configfs.c logic, a fabric call for
config_item_name() in TFO->drop_wwn() context returns NULL as
target_fabric_drop_wwn() invoking config_item_put() ->
config_group_put() will release fabric_port->port_wwn.wwn_group
before the last config_item_put() -> TFO->drop_wwn() is
invoked.

Reported-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/loopback/tcm_loop.c

@@ -1342,17 +1342,16 @@ void tcm_loop_drop_scsi_hba(
 {
 	struct tcm_loop_hba *tl_hba = container_of(wwn,
 				struct tcm_loop_hba, tl_hba_wwn);
-	int host_no = tl_hba->sh->host_no;
+
+	pr_debug("TCM_Loop_ConfigFS: Deallocating emulated Target"
+		" SAS Address: %s at Linux/SCSI Host ID: %d\n",
+		tl_hba->tl_wwn_address, tl_hba->sh->host_no);
 	/*
 	 * Call device_unregister() on the original tl_hba->dev.
 	 * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will
 	 * release *tl_hba;
 	 */
 	device_unregister(&tl_hba->dev);
-
-	pr_debug("TCM_Loop_ConfigFS: Deallocated emulated Target"
-		" SAS Address: %s at Linux/SCSI Host ID: %d\n",
-		config_item_name(&wwn->wwn_group.cg_item), host_no);
 }
 
 /* Start items for tcm_loop_cit */

drivers/target/tcm_fc/tfc_conf.c

@@ -436,8 +436,7 @@ static void ft_del_lport(struct se_wwn *wwn)
 	struct ft_lport_acl *lacl = container_of(wwn,
 				struct ft_lport_acl, fc_lport_wwn);
 
-	pr_debug("del lport %s\n",
-			config_item_name(&wwn->wwn_group.cg_item));
+	pr_debug("del lport %s\n", lacl->name);
 	mutex_lock(&ft_lport_lock);
 	list_del(&lacl->list);
 	mutex_unlock(&ft_lport_lock);