bus: uniphier-system-bus: use of_platform_default_populate() to populate default bus

Use helper of_platform_default_populate() in linux/of_platform
when possible, instead of calling of_platform_populate() with
the default match table.

Acked-by: Masahiro Yamada <[e-mail]>
Cc: Masahiro Yamada <[e-mail]>
Signed-off-by: Kefeng Wang <[e-mail]>
Signed-off-by: Rob Herring <[e-mail]>

drivers/bus/uniphier-system-bus.c

···
 	uniphier_system_bus_set_reg(priv);
 
 	/* Now, the bus is configured.  Populate platform_devices below it */
-	return of_platform_populate(dev->of_node, of_default_bus_match_table,
-				    NULL, dev);
+	return of_platform_default_populate(dev->of_node, NULL, dev);
 }
 
 static const struct of_device_id uniphier_system_bus_match[] = {