staging/line6: Convert to snd_card_new() with a device pointer

Also remove superfluous snd_card_set_dev() calls.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

drivers/staging/line6/audio.c

@@ -24,7 +24,8 @@ int line6_init_audio(struct usb_line6 *line6)
 	struct snd_card *card;
 	int err;
 
-	err = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+	err = snd_card_new(line6->ifcdev,
+			   SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
 			   THIS_MODULE, 0, &card);
 	if (err < 0)
 		return err;

drivers/staging/line6/midi.c

@@ -307,8 +307,6 @@ int line6_init_midi(struct usb_line6 *line6)
 	if (err < 0)
 		return err;
 
-	snd_card_set_dev(line6->card, line6->ifcdev);
-
 	err = snd_line6_new_midi(line6midi);
 	if (err < 0)
 		return err;

drivers/staging/line6/pcm.c

@@ -501,8 +501,6 @@ int line6_init_pcm(struct usb_line6 *line6,
 	if (err < 0)
 		return err;
 
-	snd_card_set_dev(line6->card, line6->ifcdev);
-
 	err = snd_line6_new_pcm(line6pcm);
 	if (err < 0)
 		return err;