of/platform: Propagate firmware node by calling device_set_node()

Insulate of_device_alloc() and of_amba_device_create() from possible
changes to fwnode_handle implementation by using device_set_node()
instead of open-coding dev->dev.fwnode assignments.

Signed-off-by: Andy Shevchenko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring <[e-mail]>

drivers/of/platform.c

···
 		}
 	}
 
-	dev->dev.of_node = of_node_get(np);
-	dev->dev.fwnode = &np->fwnode;
+	/* setup generic device info */
+	device_set_node(&dev->dev, of_fwnode_handle(np));
 	dev->dev.parent = parent ? : &platform_bus;
 
 	if (bus_id)
···
 	dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
 
 	/* setup generic device info */
-	dev->dev.of_node = of_node_get(node);
-	dev->dev.fwnode = &node->fwnode;
+	device_set_node(&dev->dev, of_fwnode_handle(node));
 	dev->dev.parent = parent ? : &platform_bus;
 	dev->dev.platform_data = platform_data;
 	if (bus_id)