drivers/video/fsl-diu-fb.c: use devm_ functions

The various devm_ functions allocate memory that is released when a driver
detaches.  This patch uses these functions for data that is allocated in
the probe function of a platform device and is only freed in the remove
function.
Signed-off-by: NDamien Cassou <damien.cassou@lifl.fr>
Signed-off-by: NFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>

drivers/video/fsl-diu-fb.c

@@ -1501,8 +1501,8 @@ static int __devinit fsl_diu_probe(struct platform_device *pdev)
 	unsigned int i;
 	int ret;
 
-	data = dma_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
-				  &dma_addr, GFP_DMA | __GFP_ZERO);
+	data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
+				   &dma_addr, GFP_DMA | __GFP_ZERO);
 	if (!data)
 		return -ENOMEM;
 	data->dma_addr = dma_addr;
@@ -1628,9 +1628,6 @@ static int __devinit fsl_diu_probe(struct platform_device *pdev)
 
 	iounmap(data->diu_reg);
 
-	dma_free_coherent(&pdev->dev, sizeof(struct fsl_diu_data), data,
-			  data->dma_addr);
-
 	return ret;
 }
 
@@ -1648,9 +1645,6 @@ static int fsl_diu_remove(struct platform_device *pdev)
 
 	iounmap(data->diu_reg);
 
-	dma_free_coherent(&pdev->dev, sizeof(struct fsl_diu_data), data,
-			  data->dma_addr);
-
 	return 0;
 }