fw_devlink for arm scmi

[Peng Fan]

Hi Saravana,

Hope you are doing well. We are facing an issue with
fw_devlink for arm scmi drivers. Per my understanding,
the current fw_devlink only supports one device for
one fwnode. However current arm_scmi bus driver
could create multiple supplier devices for one fwnode.
But the fw_devlink only use the first assigned fwnode->dev
as supplier or consumer, see device_add.

Do you have any suggestions on how to support multiple
devices created for one fwnode?

Thanks,
Peng.