rt61pci: rt61pci_beacon_update do not free skb twice

The layer above will free the skb in an error case.

Signed-off-by: Daniel Wagner <[e-mail]>
Signed-off-by: Ivo van Doorn <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

drivers/net/wireless/rt2x00/rt61pci.c

···
 	 * beacon frame.
 	 */
 	if (skb_headroom(skb) < TXD_DESC_SIZE) {
-		if (pskb_expand_head(skb, TXD_DESC_SIZE, 0, GFP_ATOMIC)) {
-			dev_kfree_skb(skb);
+		if (pskb_expand_head(skb, TXD_DESC_SIZE, 0, GFP_ATOMIC))
 			return -ENOMEM;
-		}
 	}
 
 	/*