WorkStruct: make allyesconfig

Fix up for make allyesconfig.

Signed-Off-By: David Howells <dhowells@redhat.com>
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 74258d8..3a534e9 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -82,7 +82,7 @@
 	struct timer_list		hold_timer;
 	struct timer_list		message_age_timer;
 	struct kobject			kobj;
-	struct work_struct		carrier_check;
+	struct delayed_work		carrier_check;
 	struct rcu_head			rcu;
 };