bnx2x: Remove two prefetch()

1) Even on 64bit arches, sizeof(struct sk_buff) < 256
2) No need to prefetch same pointer twice.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Eilon Greenstein <eilong@broadcom.com>
Acked-by: Eliezer Tamir <eliezer@tamir.org.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bnx2x_main.c

@@ -1617,7 +1617,6 @@ static int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
 			rx_buf = &fp->rx_buf_ring[bd_cons];
 			skb = rx_buf->skb;
 			prefetch(skb);
-			prefetch((u8 *)skb + 256);
 			len = le16_to_cpu(cqe->fast_path_cqe.pkt_len);
 			pad = cqe->fast_path_cqe.placement_offset;
 
@@ -1668,7 +1667,6 @@ static int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
 					dma_unmap_addr(rx_buf, mapping),
 						   pad + RX_COPY_THRESH,
 						   DMA_FROM_DEVICE);
-			prefetch(skb);
 			prefetch(((char *)(skb)) + 128);
 
 			/* is this an error packet? */