mtd: onenand: 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 <[e-mail]>
Signed-off-by: Brian Norris <[e-mail]>
Signed-off-by: David Woodhouse <[e-mail]>

drivers/mtd/onenand/generic.c

···
 static int generic_onenand_probe(struct platform_device *pdev)
 {
 	struct onenand_info *info;
-	struct onenand_platform_data *pdata = pdev->dev.platform_data;
+	struct onenand_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct resource *res = pdev->resource;
 	unsigned long size = resource_size(res);
 	int err;

drivers/mtd/onenand/omap2.c

···
 	struct resource *res;
 	struct mtd_part_parser_data ppdata = {};
 
-	pdata = pdev->dev.platform_data;
+	pdata = dev_get_platdata(&pdev->dev);
 	if (pdata == NULL) {
 		dev_err(&pdev->dev, "platform data missing\n");
 		return -ENODEV;

drivers/mtd/onenand/samsung.c

···
 	struct resource *r;
 	int size, err;
 
-	pdata = pdev->dev.platform_data;
+	pdata = dev_get_platdata(&pdev->dev);
 	/* No need to check pdata. the platform data is optional */
 
 	size = sizeof(struct mtd_info) + sizeof(struct onenand_chip);