net: au1000 eth: simplify logical expression

(a && a > 0) is equivalent to (a > 0).

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/amd/au1000_eth.c

@@ -1269,7 +1269,7 @@ static int au1000_probe(struct platform_device *pdev)
 		aup->phy_irq = pd->phy_irq;
 	}
 
-	if (aup->phy_busid && aup->phy_busid > 0) {
+	if (aup->phy_busid > 0) {
 		dev_err(&pdev->dev, "MAC0-associated PHY attached 2nd MACs MII bus not supported yet\n");
 		err = -ENODEV;
 		goto err_mdiobus_alloc;