ASoC: soc-ops: use snd_soc_card_get_kcontrol() at snd_soc_limit_volume()

snd_soc_limit_volume() is finding snd_kcontrol by using original coding,
but we already have snd_soc_card_get_kcontrol().
Let's use existing function.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87y2y3afgd.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-ops.c

@@ -592,23 +592,16 @@ EXPORT_SYMBOL_GPL(snd_soc_get_volsw_range);
 int snd_soc_limit_volume(struct snd_soc_card *card,
 	const char *name, int max)
 {
-	struct snd_card *snd_card = card->snd_card;
 	struct snd_kcontrol *kctl;
 	struct soc_mixer_control *mc;
-	int found = 0;
 	int ret = -EINVAL;
 
 	/* Sanity check for name and max */
 	if (unlikely(!name || max <= 0))
 		return -EINVAL;
 
-	list_for_each_entry(kctl, &snd_card->controls, list) {
-		if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
-			found = 1;
-			break;
-		}
-	}
-	if (found) {
+	kctl = snd_soc_card_get_kcontrol(card, name);
+	if (kctl) {
 		mc = (struct soc_mixer_control *)kctl->private_value;
 		if (max <= mc->max) {
 			mc->platform_max = max;