qlcnic: Fix function return error check

Driver was treating -ve return value as success in case of
qlcnic_enable_msi_legacy() failure
Signed-off-by: NShahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c

@@ -818,7 +818,7 @@ static int qlcnic_82xx_setup_intr(struct qlcnic_adapter *adapter)
 			qlcnic_disable_multi_tx(adapter);
 
 			err = qlcnic_enable_msi_legacy(adapter);
-			if (!err)
+			if (err)
 				return err;
 		}
 	}