net:phy:davicom: remove unnecessary code

Compile tested.
remove unnecessary code that matches this coccinelle pattern

	ret = phy_write(x, y , z)
	if (ret < 0)
		return ret;
	return 0;

As phy_write returns error code, we dont need to do not need extra check
before returning.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/davicom.c

@@ -134,12 +134,7 @@ static int dm9161_config_init(struct phy_device *phydev)
 		return err;
 
 	/* Reconnect the PHY, and enable Autonegotiation */
-	err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
-
-	if (err < 0)
-		return err;
-
-	return 0;
+	return phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
 }
 
 static int dm9161_ack_interrupt(struct phy_device *phydev)