PCI/pwrctl: only call of_platform_populate() if CONFIG_OF is enabled

If of_platform_populate() is called when CONFIG_OF is not defined this
leads to spurious error messages of the following type:
 pci 0000:00:01.1: failed to populate child OF nodes (-19)
 pci 0000:00:02.1: failed to populate child OF nodes (-19)

Fixes: 8fb1861 ("PCI/pwrctl: Create platform devices for child OF nodes of the port node")
Signed-off-by: Bert Karwatzki <[email protected]>
Closes: https://lore.kernel.org/all/[email protected]/
Reviewed-by: Lukas Wunner <[email protected]>
Acked-by: Krzysztof Wilczyński <[email protected]>
Reported-by: Praveenkumar Patil <[email protected]>
Acked-by: Manivannan Sadhasivam <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bartosz Golaszewski <[email protected]>

Author: spasswolf

drivers/pci/bus.c

@@ -356,7 +356,7 @@ void pci_bus_add_device(struct pci_dev *dev)
 
 	pci_dev_assign_added(dev, true);
 
-	if (pci_is_bridge(dev)) {
+	if (IS_ENABLED(CONFIG_OF) && pci_is_bridge(dev)) {
 		retval = of_platform_populate(dev->dev.of_node, NULL, NULL,
 					      &dev->dev);
 		if (retval)