Revert "configfs: Allow ->make_item() and ->make_group() to return detailed errors."

This reverts commit 11c3b79218390a139f2d474ee1e983a672d5839a.  The code
will move to PTR_ERR().

Signed-off-by: Joel Becker <joel.becker@oracle.com>
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 0e64312..614e382 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1073,24 +1073,25 @@
 	group = NULL;
 	item = NULL;
 	if (type->ct_group_ops->make_group) {
-		ret = type->ct_group_ops->make_group(to_config_group(parent_item), name, &group);
-		if (!ret) {
+		group = type->ct_group_ops->make_group(to_config_group(parent_item), name);
+		if (group) {
 			link_group(to_config_group(parent_item), group);
 			item = &group->cg_item;
 		}
 	} else {
-		ret = type->ct_group_ops->make_item(to_config_group(parent_item), name, &item);
-		if (!ret)
+		item = type->ct_group_ops->make_item(to_config_group(parent_item), name);
+		if (item)
 			link_obj(parent_item, item);
 	}
 	mutex_unlock(&subsys->su_mutex);
 
 	kfree(name);
-	if (ret) {
+	if (!item) {
 		/*
-		 * If ret != 0, then link_obj() was never called.
+		 * If item == NULL, then link_obj() was never called.
 		 * There are no extra references to clean up.
 		 */
+		ret = -ENOMEM;
 		goto out_put;
 	}