[NET]: Kill eth_copy_and_sum().

It hasn't "summed" anything in over 7 years, and it's
just a straight mempcy ala skb_copy_to_linear_data()
so just get rid of it.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/arm/ep93xx_eth.c b/drivers/net/arm/ep93xx_eth.c
index 2438c5b..f6ece1d 100644
--- a/drivers/net/arm/ep93xx_eth.c
+++ b/drivers/net/arm/ep93xx_eth.c
@@ -258,7 +258,7 @@
 			skb_reserve(skb, 2);
 			dma_sync_single(NULL, ep->descs->rdesc[entry].buf_addr,
 						length, DMA_FROM_DEVICE);
-			eth_copy_and_sum(skb, ep->rx_buf[entry], length, 0);
+			skb_copy_to_linear_data(skb, ep->rx_buf[entry], length);
 			skb_put(skb, length);
 			skb->protocol = eth_type_trans(skb, dev);