USB: mcs7830: return negative if auto negotiate fails

The original code returns 0 on success and 1 on failure.  In fact, at
this point, "ret" is already either zero or a negative error code so
we can just return it directly.
Signed-off-by: NDan Carpenter <error27@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/usb/mcs7830.c

@@ -355,7 +355,7 @@ static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
 	if (!ret)
 		ret = mcs7830_write_phy(dev, MII_BMCR,
 				BMCR_ANENABLE | BMCR_ANRESTART	);
-	return ret < 0 ? : 0;
+	return ret;
 }