lpc_eth: Use resource_size instead of computation

This issue was reported by coccicheck using the semantic patch
at scripts/coccinelle/api/resource_size.cocci

Signed-off-by: Benoit Taine <benoit.taine@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/nxp/lpc_eth.c

@@ -1361,7 +1361,7 @@ static int lpc_eth_drv_probe(struct platform_device *pdev)
 	__lpc_eth_clock_enable(pldat, true);
 
 	/* Map IO space */
-	pldat->net_base = ioremap(res->start, res->end - res->start + 1);
+	pldat->net_base = ioremap(res->start, resource_size(res));
 	if (!pldat->net_base) {
 		dev_err(&pdev->dev, "failed to map registers\n");
 		ret = -ENOMEM;
@@ -1417,10 +1417,8 @@ static int lpc_eth_drv_probe(struct platform_device *pdev)
 	}
 	pldat->dma_buff_base_p = dma_handle;
 
-	netdev_dbg(ndev, "IO address start     :0x%08x\n",
-			res->start);
-	netdev_dbg(ndev, "IO address size      :%d\n",
-			res->end - res->start + 1);
+	netdev_dbg(ndev, "IO address space     :%pR\n", res);
+	netdev_dbg(ndev, "IO address size      :%d\n", resource_size(res));
 	netdev_dbg(ndev, "IO address (mapped)  :0x%p\n",
 			pldat->net_base);
 	netdev_dbg(ndev, "IRQ number           :%d\n", ndev->irq);