serdev: Set fwnode for serdev devices

This allow fw_devlink to do dependency tracking for serdev devices.

Reported-by: Florian Fainelli <[email protected]>
Link: https://lore.kernel.org/lkml/[email protected]/
Cc: Stefan Wahren <[email protected]>
Signed-off-by: Saravana Kannan <[email protected]>
Tested-by: Stefan Wahren <[email protected]>
Tested-by: Florian Fainelli <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Saravana Kannan

drivers/tty/serdev/core.c

@@ -534,7 +534,7 @@ static int of_serdev_register_devices(struct serdev_controller *ctrl)
 		if (!serdev)
 			continue;
 
-		serdev->dev.of_node = node;
+		device_set_node(&serdev->dev, of_fwnode_handle(node));
 
 		err = serdev_device_add(serdev);
 		if (err) {