firewire: cdev: fix fw_cdev_event_bus_reset.bm_node_id

Fix an obscure ABI feature that is a bit of a hassle to implement.
However, somebody put it into the ABI, so let's fill in a sensible
value there.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/include/linux/firewire.h b/include/linux/firewire.h
index e44b502..db30a75 100644
--- a/include/linux/firewire.h
+++ b/include/linux/firewire.h
@@ -119,6 +119,7 @@
 	int bm_retries;
 	int bm_generation;
 	__be32 bm_transaction_data[2];
+	int bm_node_id;
 	bool bm_abdicate;
 
 	bool priority_budget_implemented;	/* controller feature */