serial: 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/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index c77bf0c..c751706 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -200,7 +200,7 @@
 
 static int serial_omap_get_context_loss_count(struct uart_omap_port *up)
 {
-	struct omap_uart_port_info *pdata = up->dev->platform_data;
+	struct omap_uart_port_info *pdata = dev_get_platdata(up->dev);
 
 	if (!pdata || !pdata->get_context_loss_count)
 		return -EINVAL;
@@ -210,7 +210,7 @@
 
 static void serial_omap_enable_wakeup(struct uart_omap_port *up, bool enable)
 {
-	struct omap_uart_port_info *pdata = up->dev->platform_data;
+	struct omap_uart_port_info *pdata = dev_get_platdata(up->dev);
 
 	if (!pdata || !pdata->enable_wakeup)
 		return;
@@ -1409,7 +1409,7 @@
 {
 	struct uart_omap_port	*up;
 	struct resource		*mem, *irq;
-	struct omap_uart_port_info *omap_up_info = pdev->dev.platform_data;
+	struct omap_uart_port_info *omap_up_info = dev_get_platdata(&pdev->dev);
 	int ret;
 
 	if (pdev->dev.of_node) {