ata: 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>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/drivers/ata/pata_imx.c b/drivers/ata/pata_imx.c
index aa3d166..4ec7c04 100644
--- a/drivers/ata/pata_imx.c
+++ b/drivers/ata/pata_imx.c
@@ -177,7 +177,7 @@
 
 static int pata_imx_remove(struct platform_device *pdev)
 {
-	struct ata_host *host = dev_get_drvdata(&pdev->dev);
+	struct ata_host *host = platform_get_drvdata(pdev);
 	struct pata_imx_priv *priv = host->private_data;
 
 	ata_host_detach(host);