dma: 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: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>

drivers/dma/fsldma.c

@@ -1368,7 +1368,7 @@ static int fsldma_of_probe(struct platform_device *op)
 
 	dma_set_mask(&(op->dev), DMA_BIT_MASK(36));
 
-	dev_set_drvdata(&op->dev, fdev);
+	platform_set_drvdata(op, fdev);
 
 	/*
 	 * We cannot use of_platform_bus_probe() because there is no
@@ -1417,7 +1417,7 @@ static int fsldma_of_remove(struct platform_device *op)
 	struct fsldma_device *fdev;
 	unsigned int i;
 
-	fdev = dev_get_drvdata(&op->dev);
+	fdev = platform_get_drvdata(op);
 	dma_async_device_unregister(&fdev->common);
 
 	fsldma_free_irqs(fdev);
@@ -1428,7 +1428,6 @@ static int fsldma_of_remove(struct platform_device *op)
 	}
 
 	iounmap(fdev->regs);
-	dev_set_drvdata(&op->dev, NULL);
 	kfree(fdev);
 
 	return 0;

drivers/dma/ppc4xx/adma.c

@@ -4481,7 +4481,7 @@ static int ppc440spe_adma_probe(struct platform_device *ofdev)
 	adev->dev = &ofdev->dev;
 	adev->common.dev = &ofdev->dev;
 	INIT_LIST_HEAD(&adev->common.channels);
-	dev_set_drvdata(&ofdev->dev, adev);
+	platform_set_drvdata(ofdev, adev);
 
 	/* create a channel */
 	chan = kzalloc(sizeof(*chan), GFP_KERNEL);
@@ -4594,14 +4594,13 @@ static int ppc440spe_adma_probe(struct platform_device *ofdev)
  */
 static int ppc440spe_adma_remove(struct platform_device *ofdev)
 {
-	struct ppc440spe_adma_device *adev = dev_get_drvdata(&ofdev->dev);
+	struct ppc440spe_adma_device *adev = platform_get_drvdata(ofdev);
 	struct device_node *np = ofdev->dev.of_node;
 	struct resource res;
 	struct dma_chan *chan, *_chan;
 	struct ppc_dma_chan_ref *ref, *_ref;
 	struct ppc440spe_adma_chan *ppc440spe_chan;
 
-	dev_set_drvdata(&ofdev->dev, NULL);
 	if (adev->id < PPC440SPE_ADMA_ENGINES_NUM)
 		ppc440spe_adma_devices[adev->id] = -1;