greybus: bundle: remove private data field

Remove the private data field from the bundle structure as it is no
longer needed. Bundle drivers can use the driver data field in the
bundle device.

Update the only current user to use the connection private data until it
has been converted to a bundle driver.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/bundle.h

@@ -29,7 +29,6 @@ struct gb_bundle {
 	u8			*state;
 
 	struct list_head	links;	/* interface->bundles */
-	void			*private;
 };
 #define to_gb_bundle(d) container_of(d, struct gb_bundle, dev)
 

drivers/staging/greybus/loopback.c

@@ -1121,7 +1121,7 @@ static int gb_loopback_connection_init(struct gb_connection *connection)
 	gb->file = debugfs_create_file(name, S_IFREG | S_IRUGO, gb_dev.root, gb,
 				       &gb_loopback_debugfs_latency_ops);
 	gb->connection = connection;
-	connection->bundle->private = gb;
+	connection->private = gb;
 
 	gb->id = ida_simple_get(&loopback_ida, 0, 0, GFP_KERNEL);
 	if (gb->id < 0) {
@@ -1177,7 +1177,6 @@ static int gb_loopback_connection_init(struct gb_connection *connection)
 	ida_simple_remove(&loopback_ida, gb->id);
 out_ida:
 	debugfs_remove(gb->file);
-	connection->bundle->private = NULL;
 out_kzalloc:
 	kfree(gb);
 
@@ -1186,13 +1185,12 @@ static int gb_loopback_connection_init(struct gb_connection *connection)
 
 static void gb_loopback_connection_exit(struct gb_connection *connection)
 {
-	struct gb_loopback *gb = connection->bundle->private;
+	struct gb_loopback *gb = connection->private;
 	unsigned long flags;
 
 	if (!IS_ERR_OR_NULL(gb->task))
 		kthread_stop(gb->task);
 
-	connection->bundle->private = NULL;
 	kfifo_free(&gb->kfifo_lat);
 	kfifo_free(&gb->kfifo_ts);
 	gb_connection_latency_tag_disable(connection);