USB: host: use dev_get_platdata()

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/host/imx21-hcd.c b/drivers/usb/host/imx21-hcd.c
index 03dc4d9..60a5de5 100644
--- a/drivers/usb/host/imx21-hcd.c
+++ b/drivers/usb/host/imx21-hcd.c
@@ -1860,7 +1860,7 @@
 	imx21 = hcd_to_imx21(hcd);
 	imx21->hcd = hcd;
 	imx21->dev = &pdev->dev;
-	imx21->pdata = pdev->dev.platform_data;
+	imx21->pdata = dev_get_platdata(&pdev->dev);
 	if (!imx21->pdata)
 		imx21->pdata = &default_pdata;