device property: Clarify usage scope of some struct fwnode_handle members

Most of the struct fwnode_handle members are for exclusive use with
device links framework. Clarify this by adding a respective comment.

Signed-off-by: Andy Shevchenko <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Reviewed-by: Sakari Ailus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: andy-shev

include/linux/fwnode.h

@@ -41,6 +41,8 @@ struct device;
 struct fwnode_handle {
 	struct fwnode_handle *secondary;
 	const struct fwnode_operations *ops;
+
+	/* The below is used solely by device links, don't use otherwise */
 	struct device *dev;
 	struct list_head suppliers;
 	struct list_head consumers;