ALSA: ml403-ac97cr: 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: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/drivers/ml403-ac97cr.c

@@ -1325,7 +1325,6 @@ static int snd_ml403_ac97cr_probe(struct platform_device *pfdev)
 static int snd_ml403_ac97cr_remove(struct platform_device *pfdev)
 {
 	snd_card_free(platform_get_drvdata(pfdev));
-	platform_set_drvdata(pfdev, NULL);
 	return 0;
 }