net:phy:bcm63xx: 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: NSrinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/phy/bcm63xx.c

@@ -39,10 +39,7 @@ static int bcm63xx_config_init(struct phy_device *phydev)
 		MII_BCM63XX_IR_SPEED |
 		MII_BCM63XX_IR_LINK) |
 		MII_BCM63XX_IR_EN;
-	err = phy_write(phydev, MII_BCM63XX_IR, reg);
-	if (err < 0)
-		return err;
-	return 0;
+	return phy_write(phydev, MII_BCM63XX_IR, reg);
 }
 
 static int bcm63xx_ack_interrupt(struct phy_device *phydev)