USB: host: 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 &pdev->dev,
so we can directly pass a struct platform_device.

Also, unnecessary dev_set_drvdata() is removed, because the driver core
clears the driver data to NULL after device_release or on probe failure.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/host/ehci-grlib.c b/drivers/usb/host/ehci-grlib.c
index 5d75de9..a77bd8d 100644
--- a/drivers/usb/host/ehci-grlib.c
+++ b/drivers/usb/host/ehci-grlib.c
@@ -153,9 +153,7 @@
 
 static int ehci_hcd_grlib_remove(struct platform_device *op)
 {
-	struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
-
-	dev_set_drvdata(&op->dev, NULL);
+	struct usb_hcd *hcd = platform_get_drvdata(op);
 
 	dev_dbg(&op->dev, "stopping GRLIB GRUSBHC EHCI USB Controller\n");
 
@@ -171,7 +169,7 @@
 
 static void ehci_hcd_grlib_shutdown(struct platform_device *op)
 {
-	struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
+	struct usb_hcd *hcd = platform_get_drvdata(op);
 
 	if (hcd->driver->shutdown)
 		hcd->driver->shutdown(hcd);