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/sc26xx.c b/drivers/tty/serial/sc26xx.c
index 4b1434d..887b4f7 100644
--- a/drivers/tty/serial/sc26xx.c
+++ b/drivers/tty/serial/sc26xx.c
@@ -637,7 +637,7 @@
 {
 	struct resource *res;
 	struct uart_sc26xx_port *up;
-	unsigned int *sc26xx_data = dev->dev.platform_data;
+	unsigned int *sc26xx_data = dev_get_platdata(&dev->dev);
 	int err;
 
 	res = platform_get_resource(dev, IORESOURCE_MEM, 0);