mac802154: use goto label on failure

Signed-off-by: NVarka Bhadram <varkab@cdac.in>
Reviewed-by: NStefan Schmidt <s.schmidt@samsung.com>
Acked-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

net/mac802154/rx.c

@@ -85,8 +85,7 @@ ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata,
 	default:
 		spin_unlock_bh(&sdata->mib_lock);
 		pr_debug("invalid dest mode\n");
-		kfree_skb(skb);
-		return NET_RX_DROP;
+		goto fail;
 	}
 
 	spin_unlock_bh(&sdata->mib_lock);