devicetree: Change scan_bus() prototype in device ops

The input/output value max is no longer used for tracking the
bus enumeration sequence, everything is handled in the context
of devicetree bus objects.

Change-Id: I545088bd8eaf205b1436d8c52d3bc7faf4cfb0f9
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/8541
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/include/device/pciexp.h b/src/include/device/pciexp.h
index b600228..f3df1a5 100644
--- a/src/include/device/pciexp.h
+++ b/src/include/device/pciexp.h
@@ -12,7 +12,7 @@
 void pciexp_scan_bus(struct bus *bus, unsigned int min_devfn,
 			     unsigned int max_devfn);
 
-unsigned int pciexp_scan_bridge(device_t dev, unsigned int max);
+void pciexp_scan_bridge(device_t dev);
 
 extern struct device_operations default_pciexp_ops_bus;