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: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index 3353991..32a8503 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -211,8 +211,6 @@
 	}
 
 	if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
-		int temp;
-
 		temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 		if (temp < 0)
 			return temp;