can: ti_hecc: convert to devm_platform_ioremap_resource_byname()

Use the function devm_platform_ioremap_resource_byname() to simplify
source code which calls the functions platform_get_resource_byname()
and devm_ioremap_resource(). Remove also a few error messages which
became unnecessary with this software refactoring.
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Link: https://lore.kernel.org/r/20200420132207.8536-1-zhengdejin5@gmail.comSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/ti_hecc.c

@@ -857,7 +857,7 @@ static int ti_hecc_probe(struct platform_device *pdev)
 	struct net_device *ndev = (struct net_device *)0;
 	struct ti_hecc_priv *priv;
 	struct device_node *np = pdev->dev.of_node;
-	struct resource *res, *irq;
+	struct resource *irq;
 	struct regulator *reg_xceiver;
 	int err = -ENODEV;
 
@@ -878,39 +878,22 @@ static int ti_hecc_probe(struct platform_device *pdev)
 	priv = netdev_priv(ndev);
 
 	/* handle hecc memory */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hecc");
-	if (!res) {
-		dev_err(&pdev->dev, "can't get IORESOURCE_MEM hecc\n");
-		return -EINVAL;
-	}
-
-	priv->base = devm_ioremap_resource(&pdev->dev, res);
+	priv->base = devm_platform_ioremap_resource_byname(pdev, "hecc");
 	if (IS_ERR(priv->base)) {
 		dev_err(&pdev->dev, "hecc ioremap failed\n");
 		return PTR_ERR(priv->base);
 	}
 
 	/* handle hecc-ram memory */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hecc-ram");
-	if (!res) {
-		dev_err(&pdev->dev, "can't get IORESOURCE_MEM hecc-ram\n");
-		return -EINVAL;
-	}
-
-	priv->hecc_ram = devm_ioremap_resource(&pdev->dev, res);
+	priv->hecc_ram = devm_platform_ioremap_resource_byname(pdev,
+							       "hecc-ram");
 	if (IS_ERR(priv->hecc_ram)) {
 		dev_err(&pdev->dev, "hecc-ram ioremap failed\n");
 		return PTR_ERR(priv->hecc_ram);
 	}
 
 	/* handle mbx memory */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mbx");
-	if (!res) {
-		dev_err(&pdev->dev, "can't get IORESOURCE_MEM mbx\n");
-		return -EINVAL;
-	}
-
-	priv->mbx = devm_ioremap_resource(&pdev->dev, res);
+	priv->mbx = devm_platform_ioremap_resource_byname(pdev, "mbx");
 	if (IS_ERR(priv->mbx)) {
 		dev_err(&pdev->dev, "mbx ioremap failed\n");
 		return PTR_ERR(priv->mbx);