net: marvell.c fix sparse shadowed variable warning

The other if blocks don't redeclare temp, remove the redeclaration in
the final if() block.

drivers/net/phy/marvell.c:214:7: warning: symbol 'temp' shadows an earlier one
drivers/net/phy/marvell.c:160:6: originally declared here
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/net/phy/marvell.c

@@ -211,8 +211,6 @@ static int m88e1111_config_init(struct phy_device *phydev)
 	}
 
 	if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
-		int temp;
-
 		temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 		if (temp < 0)
 			return temp;