ASoC: ep93xx: Remove redundant platform_set_drvdata()

Commit 0998d063 (device-core: Ensure drvdata = NULL when no
driver is bound) removes the need to set driver data field to
NULL.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/cirrus/ep93xx-ac97.c

@@ -403,7 +403,6 @@ static int ep93xx_ac97_probe(struct platform_device *pdev)
 	return 0;
 
 fail:
-	platform_set_drvdata(pdev, NULL);
 	ep93xx_ac97_info = NULL;
 	dev_set_drvdata(&pdev->dev, NULL);
 	return ret;
@@ -418,7 +417,6 @@ static int ep93xx_ac97_remove(struct platform_device *pdev)
 	/* disable the AC97 controller */
 	ep93xx_ac97_write_reg(info, AC97GCR, 0);
 
-	platform_set_drvdata(pdev, NULL);
 	ep93xx_ac97_info = NULL;
 	dev_set_drvdata(&pdev->dev, NULL);