phy: renesas: r8a779f0-ether-serdes: Convert to devm_platform_ioremap_resource()

Use devm_platform_ioremap_resource() to simplify code.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230705090126.26854-3-frank.li@vivo.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/renesas/r8a779f0-ether-serdes.c

@@ -339,22 +339,15 @@ static int r8a779f0_eth_serdes_probe(struct platform_device *pdev)
 {
 	struct r8a779f0_eth_serdes_drv_data *dd;
 	struct phy_provider *provider;
-	struct resource *res;
 	int i;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "invalid resource\n");
-		return -EINVAL;
-	}
-
 	dd = devm_kzalloc(&pdev->dev, sizeof(*dd), GFP_KERNEL);
 	if (!dd)
 		return -ENOMEM;
 
 	platform_set_drvdata(pdev, dd);
 	dd->pdev = pdev;
-	dd->addr = devm_ioremap_resource(&pdev->dev, res);
+	dd->addr = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(dd->addr))
 		return PTR_ERR(dd->addr);