Minor code cleanup in drivers/net/r6040.c

Replaced '0' by 'bar' in the probe function.

The 'bar' variable was already set to '0' and is already
used in pci_iomap(). This is cleaner and improves code
consistency.
Signed-off-by: Michael Opdenacker <michael@free-electrons.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/r6040.c

@@ -1112,13 +1112,13 @@ static int __devinit r6040_init_one(struct pci_dev *pdev,
 	}
 
 	/* IO Size check */
-	if (pci_resource_len(pdev, 0) < io_size) {
+	if (pci_resource_len(pdev, bar) < io_size) {
 		printk(KERN_ERR DRV_NAME ": Insufficient PCI resources, aborting\n");
 		err = -EIO;
 		goto err_out;
 	}
 
-	pioaddr = pci_resource_start(pdev, 0);	/* IO map base address */
+	pioaddr = pci_resource_start(pdev, bar);	/* IO map base address */
 	pci_set_master(pdev);
 
 	dev = alloc_etherdev(sizeof(struct r6040_private));