mac802154: rename dev_workqueue to workqueue

Small rename to use the name workqueue than dev_workqueue. To bring the
same naming convention like wireless into 802.15.4.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/mac802154/ieee802154_i.h b/net/mac802154/ieee802154_i.h
index 61885aa..7aae692 100644
--- a/net/mac802154/ieee802154_i.h
+++ b/net/mac802154/ieee802154_i.h
@@ -48,7 +48,7 @@
 	/* This one is used for scanning and other jobs not to be interfered
 	 * with serial driver.
 	 */
-	struct workqueue_struct	*dev_workqueue;
+	struct workqueue_struct	*workqueue;
 
 	/* SoftMAC device is registered and running. One can add subinterfaces.
 	 * This flag should be modified under slaves_mtx and RTNL, so you can