WorkStruct: make allyesconfig

Fix up for make allyesconfig.

Signed-Off-By: David Howells <dhowells@redhat.com>
diff --git a/drivers/net/wireless/ipw2100.h b/drivers/net/wireless/ipw2100.h
index 55b7227..de7d384 100644
--- a/drivers/net/wireless/ipw2100.h
+++ b/drivers/net/wireless/ipw2100.h
@@ -583,11 +583,11 @@
 	struct tasklet_struct irq_tasklet;
 
 	struct workqueue_struct *workqueue;
-	struct work_struct reset_work;
-	struct work_struct security_work;
-	struct work_struct wx_event_work;
-	struct work_struct hang_check;
-	struct work_struct rf_kill;
+	struct delayed_work reset_work;
+	struct delayed_work security_work;
+	struct delayed_work wx_event_work;
+	struct delayed_work hang_check;
+	struct delayed_work rf_kill;
 
 	u32 interrupts;
 	int tx_interrupts;