net: netcp: ethss: remove unnecessary pointer set to NULL

If statement has make sure the 'slave->phy' is NULL

Signed-off-by: YueHaibing <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/ti/netcp_ethss.c

···
 		if (!slave->phy) {
 			dev_err(dev, "phy not found for slave %d\n",
 				slave->slave_num);
-			slave->phy = NULL;
 		} else {
 			dev_dbg(dev, "phy found: id is: 0x%s\n",
 				phydev_name(slave->phy));