ALSA: Remove the rest of *_set_drvdata(NULL) calls

A few calls are still left in parport drivers after this commit, which
I'm not quite sure yet.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/arm/aaci.c

@@ -1076,8 +1076,6 @@ static int aaci_remove(struct amba_device *dev)
 {
 	struct snd_card *card = amba_get_drvdata(dev);
 
-	amba_set_drvdata(dev, NULL);
-
 	if (card) {
 		struct aaci *aaci = card->private_data;
 		writel(0, aaci->base + AACI_MAINCR);

sound/drivers/dummy.c

@@ -1129,7 +1129,6 @@ static int snd_dummy_probe(struct platform_device *devptr)
 static int snd_dummy_remove(struct platform_device *devptr)
 {
 	snd_card_free(platform_get_drvdata(devptr));
-	platform_set_drvdata(devptr, NULL);
 	return 0;
 }
 

sound/parisc/harmony.c

@@ -902,8 +902,6 @@ snd_harmony_free(struct snd_harmony *h)
 	if (h->iobase)
 		iounmap(h->iobase);
 
-	parisc_set_drvdata(h->dev, NULL);
-
 	kfree(h);
 	return 0;
 }
@@ -1016,7 +1014,6 @@ static int
 snd_harmony_remove(struct parisc_device *padev)
 {
 	snd_card_free(parisc_get_drvdata(padev));
-	parisc_set_drvdata(padev, NULL);
 	return 0;
 }
 

sound/sparc/dbri.c

@@ -2670,8 +2670,6 @@ static int dbri_remove(struct platform_device *op)
 	snd_dbri_free(card->private_data);
 	snd_card_free(card);
 
-	dev_set_drvdata(&op->dev, NULL);
-
 	return 0;
 }
 

sound/spi/at73c213.c

@@ -1070,7 +1070,6 @@ static int snd_at73c213_remove(struct spi_device *spi)
 
 	ssc_free(chip->ssc);
 	snd_card_free(card);
-	dev_set_drvdata(&spi->dev, NULL);
 
 	return 0;
 }