net: dl2k: remove redundant re-assignment to np

The pointer np is initialized and then re-assigned the same value
a few lines later. Remove the redundant duplicated assignment. Cleans
up clang warning:

drivers/net/ethernet/dlink/dl2k.c:314:25: warning: Value stored to
'np' during its initialization is never read
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/dlink/dl2k.c

@@ -313,7 +313,7 @@ find_miiphy (struct net_device *dev)
 {
 	struct netdev_private *np = netdev_priv(dev);
 	int i, phy_found = 0;
-	np = netdev_priv(dev);
+
 	np->phy_addr = 1;
 
 	for (i = 31; i >= 0; i--) {