usb: gadget: r8a66597: convert to devm_platform_ioremap_resource_byname

Use devm_platform_ioremap_resource_byname() to simplify code
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1595404275-8449-5-git-send-email-chunfeng.yun@mediatek.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/udc/r8a66597-udc.c

@@ -1827,10 +1827,8 @@ static void nop_completion(struct usb_ep *ep, struct usb_request *r)
 static int r8a66597_sudmac_ioremap(struct r8a66597 *r8a66597,
 					  struct platform_device *pdev)
 {
-	struct resource *res;
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sudmac");
-	r8a66597->sudmac_reg = devm_ioremap_resource(&pdev->dev, res);
+	r8a66597->sudmac_reg =
+		devm_platform_ioremap_resource_byname(pdev, "sudmac");
 	return PTR_ERR_OR_ZERO(r8a66597->sudmac_reg);
 }