ieee1394: remove declarations of nonexisting functions

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index dbeba45..874d4d4 100644
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -1756,7 +1756,7 @@
 	return error;
 }
 
-/* The following four convenience functions use a struct node_entry
+/* The following two convenience functions use a struct node_entry
  * for addressing a node on the bus.  They are intended for use by any
  * process context, not just the nodemgr thread, so we need to be a
  * little careful when reading out the node ID and generation.  The