spmi: Set fwnode for spmi devices

This allows fw_devlink to do proper dependency tracking for SPMI
devices. So, better deferred probe handling, async probing, async
suspend/resume, etc.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20241115230509.1793191-1-saravanak@google.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20250116235339.300485-2-sboyd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Saravana Kannan

drivers/spmi/spmi.c

@@ -517,7 +517,7 @@ static void of_spmi_register_devices(struct spmi_controller *ctrl)
 		if (!sdev)
 			continue;
 
-		sdev->dev.of_node = node;
+		device_set_node(&sdev->dev, of_fwnode_handle(node));
 		sdev->usid = (u8)reg[0];
 
 		err = spmi_device_add(sdev);