soc/intel: Replace config_of_path() with config_of_soc()

The previously provided device path made no difference, all
integrated PCI devices point back to the same chip_info
structure.

Change reduces the exposure of various SA_DEVFN_xx and
PCH_DEVFN_xx from (ugly) soc/pci_devs.h.

Change-Id: Ibf13645fdd3ef7fd3d5c8217bb24d7ede045c790
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35656
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/include/device/device.h b/src/include/device/device.h
index f24e4b2..cb37c09 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -321,16 +321,9 @@
 	devtree_die();
 }
 
-static inline DEVTREE_CONST void *config_of_path(pci_devfn_t devfn)
+static inline DEVTREE_CONST void *config_of_soc(void)
 {
-	const struct device *dev = pcidev_path_on_root(devfn);
-	if (dev)
-		return config_of(dev);
-
-	devtree_bug(__func__, devfn);
-
-	dev = dev_find_slot(0, devfn);
-	return config_of(dev);
+	return config_of(pcidev_on_root(0, 0));
 }
 
 void scan_smbus(struct device *bus);