ASoC: WL1273 FM Radio: Eliminate unnecessary error return value.

With this change it's not a error to call wl1273_set_audio_route
when the codec is active if the new routing value is the same
as the current active setting.
Signed-off-by: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

sound/soc/codecs/wl1273.c

@@ -193,6 +193,9 @@ static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 
+	if (wl1273->mode == ucontrol->value.integer.value[0])
+		return 0;
+
 	/* Do not allow changes while stream is running */
 	if (codec->active)
 		return -EPERM;