Bluetooth: Use PTR_RET function

Used PTR_RET function instead of IS_ERR and PTR_ERR.
Patch found using coccinelle.
Signed-off-by: Alexandru Gheorghiu <gheorghiuandru@gmail.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

net/bluetooth/hci_sysfs.c

@@ -590,10 +590,8 @@ int __init bt_sysfs_init(void)
 	bt_debugfs = debugfs_create_dir("bluetooth", NULL);
 
 	bt_class = class_create(THIS_MODULE, "bluetooth");
-	if (IS_ERR(bt_class))
-		return PTR_ERR(bt_class);
 
-	return 0;
+	return PTR_RET(bt_class);
 }
 
 void bt_sysfs_cleanup(void)