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 <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230615145243.37095-1-andriy.shevchenko@linux.intel.com


Signed-off-by: Rob Herring <robh@kernel.org>