ALSA: drivers: Clean up with new procfs helpers

Simplify the proc fs creation code with new helper functions,
snd_card_ro_proc_new() and snd_card_rw_proc_new().
Just a code refactoring and no functional changes.

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/drivers/vx/vx_core.c

@@ -643,10 +643,7 @@ static void vx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *b
 
 static void vx_proc_init(struct vx_core *chip)
 {
-	struct snd_info_entry *entry;
-
-	if (! snd_card_proc_new(chip->card, "vx-status", &entry))
-		snd_info_set_text_ops(entry, chip, vx_proc_read);
+	snd_card_ro_proc_new(chip->card, "vx-status", chip, vx_proc_read);
 }