soc/intel/fsp_broadwell_de: Fix use of config_of()

Change-Id: I96d423720fbe67c067373436ad250edf37939e99
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34547
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
(cherry picked from commit c9c80c6907)
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35045
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/fsp_broadwell_de/iou_complto.c

@@ -17,12 +17,14 @@
 #include <device/pci_ids.h>
 #include <device/pci_ops.h>
 #include <soc/intel/fsp_broadwell_de/chip.h>
+#include <soc/pci_devs.h>
 
 #define DEVCTL2 0xb8
 
 static void iou_init(struct device *dev)
 {
-	const config_t *config = config_of(dev);
+	/* Use config from device always present in static devicetree. */
+	const config_t *config = config_of_path(SOC_DEV_FUNC);
 	u16 devctl2;
 
 	/* pcie completion timeout