ALSA: snd-ad1816a: remove useless struct snd_card_ad1816a

struct snd_card_ad1816a is only set but the values are never used then.
Removing it allows struct snd_card's private_data to be used for
struct snd_ad1816a, simplifying the code.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/isa/ad1816a/ad1816a_lib.c b/sound/isa/ad1816a/ad1816a_lib.c
index 177eed3..de5cc1c 100644
--- a/sound/isa/ad1816a/ad1816a_lib.c
+++ b/sound/isa/ad1816a/ad1816a_lib.c
@@ -548,7 +548,6 @@
 		snd_dma_disable(chip->dma2);
 		free_dma(chip->dma2);
 	}
-	kfree(chip);
 	return 0;
 }
 
@@ -573,19 +572,13 @@
 
 int __devinit snd_ad1816a_create(struct snd_card *card,
 				 unsigned long port, int irq, int dma1, int dma2,
-				 struct snd_ad1816a **rchip)
+				 struct snd_ad1816a *chip)
 {
         static struct snd_device_ops ops = {
 		.dev_free =	snd_ad1816a_dev_free,
 	};
 	int error;
-	struct snd_ad1816a *chip;
 
-	*rchip = NULL;
-
-	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-	if (chip == NULL)
-		return -ENOMEM;
 	chip->irq = -1;
 	chip->dma1 = -1;
 	chip->dma2 = -1;
@@ -631,7 +624,6 @@
 		return error;
 	}
 
-	*rchip = chip;
 	return 0;
 }