ASoC: adav80x: Use snd_pcm_hw_constraint_single()

Use the new snd_pcm_hw_constraint_single() helper function instead of
calling snd_pcm_hw_constraint_minmax() with the same value for min and max
to install a constraint that limits the possible configuration values to a
single value. Using snd_pcm_hw_constraint_single() makes the indented
result clearer.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Acked-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/soc/codecs/adav80x.c

@@ -728,8 +728,8 @@ static int adav80x_dai_startup(struct snd_pcm_substream *substream,
 	if (!snd_soc_codec_is_active(codec) || !adav80x->rate)
 		return 0;
 
-	return snd_pcm_hw_constraint_minmax(substream->runtime,
-			SNDRV_PCM_HW_PARAM_RATE, adav80x->rate, adav80x->rate);
+	return snd_pcm_hw_constraint_single(substream->runtime,
+			SNDRV_PCM_HW_PARAM_RATE, adav80x->rate);
 }
 
 static void adav80x_dai_shutdown(struct snd_pcm_substream *substream,