fec_mpc52xx: fix timestamp filtering

skb_defer_rx_timestamp was called with a freshly allocated skb but must
be called with rskb instead.

Signed-off-by: Stephan Gatzka <[e-mail]>
Cc: stable <[e-mail]>
Acked-by: Richard Cochran <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/freescale/fec_mpc52xx.c

···
 		length = status & BCOM_FEC_RX_BD_LEN_MASK;
 		skb_put(rskb, length - 4);	/* length without CRC32 */
 		rskb->protocol = eth_type_trans(rskb, dev);
-		if (!skb_defer_rx_timestamp(skb))
+		if (!skb_defer_rx_timestamp(rskb))
 			netif_rx(rskb);
 
 		spin_lock(&priv->lock);