ALSA: emu10k1: Simplify with snd_ctl_find_id_mixer()

Replace an open code with the new snd_ctl_find_id_mixer().
There is no functional change.

Link: https://lore.kernel.org/r/20230720082108.31346-5-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/emu10k1/emumixer.c

@@ -1982,18 +1982,9 @@ static int remove_ctl(struct snd_card *card, const char *name)
 	return snd_ctl_remove_id(card, &id);
 }
 
-static struct snd_kcontrol *ctl_find(struct snd_card *card, const char *name)
-{
-	struct snd_ctl_elem_id sid;
-	memset(&sid, 0, sizeof(sid));
-	strcpy(sid.name, name);
-	sid.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-	return snd_ctl_find_id(card, &sid);
-}
-
 static int rename_ctl(struct snd_card *card, const char *src, const char *dst)
 {
-	struct snd_kcontrol *kctl = ctl_find(card, src);
+	struct snd_kcontrol *kctl = snd_ctl_find_id_mixer(card, src);
 	if (kctl) {
 		snd_ctl_rename(card, kctl, dst);
 		return 0;