usb: r8a66597-hcd: use platform_{get,set}_drvdata()

Use the wrapper functions for getting and setting the driver data using
platform_device instead of using dev_{get,set}_drvdata() with &of->dev,
so we can directly pass a struct platform_device.
Signed-off-by: NLibo Chen <libo.chen@huawei.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/r8a66597-hcd.c

@@ -2393,7 +2393,7 @@ static const struct dev_pm_ops r8a66597_dev_pm_ops = {
 
 static int r8a66597_remove(struct platform_device *pdev)
 {
-	struct r8a66597		*r8a66597 = dev_get_drvdata(&pdev->dev);
+	struct r8a66597		*r8a66597 = platform_get_drvdata(pdev);
 	struct usb_hcd		*hcd = r8a66597_to_hcd(r8a66597);
 
 	del_timer_sync(&r8a66597->rh_timer);
@@ -2466,7 +2466,7 @@ static int r8a66597_probe(struct platform_device *pdev)
 	}
 	r8a66597 = hcd_to_r8a66597(hcd);
 	memset(r8a66597, 0, sizeof(struct r8a66597));
-	dev_set_drvdata(&pdev->dev, r8a66597);
+	platform_set_drvdata(pdev, r8a66597);
 	r8a66597->pdata = dev_get_platdata(&pdev->dev);
 	r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;