net/{mii, smsc}: Make mii_ethtool_get_link_ksettings and smc_netdev_get_ecmd return void

Make return value void since functions never returns meaningfull value.

Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 52ead55..b607936 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -1562,13 +1562,12 @@
 				   struct ethtool_link_ksettings *cmd)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
-	int rc;
 
 	spin_lock_irq(&ip->ioc3_lock);
-	rc = mii_ethtool_get_link_ksettings(&ip->mii, cmd);
+	mii_ethtool_get_link_ksettings(&ip->mii, cmd);
 	spin_unlock_irq(&ip->ioc3_lock);
 
-	return rc;
+	return 0;
 }
 
 static int ioc3_set_link_ksettings(struct net_device *dev,