dma: sh: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/sh/shdmac.c

@@ -890,7 +890,6 @@ rst_err:
 	pm_runtime_put(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 
-	platform_set_drvdata(pdev, NULL);
 	shdma_cleanup(&shdev->shdma_dev);
 eshdma:
 	synchronize_rcu();
@@ -919,8 +918,6 @@ static int sh_dmae_remove(struct platform_device *pdev)
 	sh_dmae_chan_remove(shdev);
 	shdma_cleanup(&shdev->shdma_dev);
 
-	platform_set_drvdata(pdev, NULL);
-
 	synchronize_rcu();
 
 	return 0;

drivers/dma/sh/sudmac.c

@@ -391,7 +391,6 @@ static int sudmac_probe(struct platform_device *pdev)
 chan_probe_err:
 	sudmac_chan_remove(su_dev);
 
-	platform_set_drvdata(pdev, NULL);
 	shdma_cleanup(&su_dev->shdma_dev);
 
 	return err;
@@ -405,7 +404,6 @@ static int sudmac_remove(struct platform_device *pdev)
 	dma_async_device_unregister(dma_dev);
 	sudmac_chan_remove(su_dev);
 	shdma_cleanup(&su_dev->shdma_dev);
-	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }