core: remove pointless conditional before kfree()

Remove pointless conditional before kfree().
Signed-off-by: NWei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/core/ethtool.c

@@ -261,7 +261,6 @@ static int ethtool_get_rxnfc(struct net_device *dev, void __user *useraddr)
 	ret = 0;
 
 err_out:
-	if (rule_buf)
 	kfree(rule_buf);
 
 	return ret;