ALSA: ac97: Use the standard snd_ctl_add_followers() helper

Instead of open-code, use the new standard helper to manage vmaster
stuff for code simplification.

Except for a debug print, there should be no functional change.

Link: https://lore.kernel.org/r/20230721071643.3631-3-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ac97/ac97_patch.c

@@ -3440,7 +3440,6 @@ static int snd_ac97_add_vmaster(struct snd_ac97 *ac97, char *name,
 				const char * const *followers)
 {
 	struct snd_kcontrol *kctl;
-	const char * const *s;
 	int err;
 
 	kctl = snd_ctl_make_virtual_master(name, tlv);
@@ -3450,20 +3449,7 @@ static int snd_ac97_add_vmaster(struct snd_ac97 *ac97, char *name,
 	if (err < 0)
 		return err;
 
-	for (s = followers; *s; s++) {
-		struct snd_kcontrol *sctl;
-
-		sctl = snd_ac97_find_mixer_ctl(ac97, *s);
-		if (!sctl) {
-			dev_dbg(ac97->bus->card->dev,
-				"Cannot find follower %s, skipped\n", *s);
-			continue;
-		}
-		err = snd_ctl_add_follower(kctl, sctl);
-		if (err < 0)
-			return err;
-	}
-	return 0;
+	return snd_ctl_add_followers(ac97->bus->card, kctl, followers);
 }
 
 static int patch_vt1616_specific(struct snd_ac97 * ac97)