[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/sunbmac.c b/drivers/net/sunbmac.c
index 2ad8d58..b3e0158 100644
--- a/drivers/net/sunbmac.c
+++ b/drivers/net/sunbmac.c
@@ -860,7 +860,7 @@
 			sbus_dma_sync_single_for_cpu(bp->bigmac_sdev,
 						     this->rx_addr, len,
 						     SBUS_DMA_FROMDEVICE);
-			eth_copy_and_sum(copy_skb, (unsigned char *)skb->data, len, 0);
+			skb_copy_to_linear_data(copy_skb, (unsigned char *)skb->data, len);
 			sbus_dma_sync_single_for_device(bp->bigmac_sdev,
 							this->rx_addr, len,
 							SBUS_DMA_FROMDEVICE);