ASoC: ep93xx: Remove redundant dev_set_drvdata() calls

The driver core does this and it's never legal to rely on the value of
drvdata if not set in probe() anyway.

Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/cirrus/ep93xx-ac97.c

@@ -405,7 +405,6 @@ static int ep93xx_ac97_probe(struct platform_device *pdev)
 fail:
 	platform_set_drvdata(pdev, NULL);
 	ep93xx_ac97_info = NULL;
-	dev_set_drvdata(&pdev->dev, NULL);
 	return ret;
 }
 
@@ -420,7 +419,6 @@ static int ep93xx_ac97_remove(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, NULL);
 	ep93xx_ac97_info = NULL;
-	dev_set_drvdata(&pdev->dev, NULL);
 
 	return 0;
 }