ALSA: es1968: 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/20230720082108.31346-6-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/es1968.c

@@ -2005,9 +2005,6 @@ snd_es1968_mixer(struct es1968 *chip)
 {
 	struct snd_ac97_bus *pbus;
 	struct snd_ac97_template ac97;
-#ifndef CONFIG_SND_ES1968_INPUT
-	struct snd_ctl_elem_id elem_id;
-#endif
 	int err;
 	static const struct snd_ac97_bus_ops ops = {
 		.write = snd_es1968_ac97_write,
@@ -2027,14 +2024,10 @@ snd_es1968_mixer(struct es1968 *chip)
 
 #ifndef CONFIG_SND_ES1968_INPUT
 	/* attach master switch / volumes for h/w volume control */
-	memset(&elem_id, 0, sizeof(elem_id));
-	elem_id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-	strcpy(elem_id.name, "Master Playback Switch");
-	chip->master_switch = snd_ctl_find_id(chip->card, &elem_id);
-	memset(&elem_id, 0, sizeof(elem_id));
-	elem_id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-	strcpy(elem_id.name, "Master Playback Volume");
-	chip->master_volume = snd_ctl_find_id(chip->card, &elem_id);
+	chip->master_switch = snd_ctl_find_id_mixer(chip->card,
+						    "Master Playback Switch");
+	chip->master_volume = snd_ctl_find_id_mixer(chip->card,
+						    "Master Playback Volume");
 #endif
 
 	return 0;