sound: Remove unnecessary casts of private_data

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/isa/gus/gusmax.c b/sound/isa/gus/gusmax.c
index f26eac8..3e4a58b 100644
--- a/sound/isa/gus/gusmax.c
+++ b/sound/isa/gus/gusmax.c
@@ -191,7 +191,7 @@
 
 static void snd_gusmax_free(struct snd_card *card)
 {
-	struct snd_gusmax *maxcard = (struct snd_gusmax *)card->private_data;
+	struct snd_gusmax *maxcard = card->private_data;
 	
 	if (maxcard == NULL)
 		return;
@@ -219,7 +219,7 @@
 	if (err < 0)
 		return err;
 	card->private_free = snd_gusmax_free;
-	maxcard = (struct snd_gusmax *)card->private_data;
+	maxcard = card->private_data;
 	maxcard->card = card;
 	maxcard->irq = -1;