usb: dwc2: convert to devm_platform_get_and_ioremap_resource

Use devm_platform_get_and_ioremap_resource() to simplify code, which
contains platform_get_resource() and devm_ioremap_resource(), it also
get the resource for use by the following code.
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Link: https://lore.kernel.org/r/20200323160612.17277-5-zhengdejin5@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/dwc2/platform.c

@@ -397,8 +397,7 @@ static int dwc2_driver_probe(struct platform_device *dev)
 		return retval;
 	}
 
-	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
-	hsotg->regs = devm_ioremap_resource(&dev->dev, res);
+	hsotg->regs = devm_platform_get_and_ioremap_resource(dev, 0, &res);
 	if (IS_ERR(hsotg->regs))
 		return PTR_ERR(hsotg->regs);