ASoC: omap: Use SOC_ENUM_SINGLE_EXT_DECL()

Just replace with the helper macro.  No functional change at all.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/omap/ams-delta.c

@@ -194,13 +194,11 @@ static int ams_delta_get_audio_mode(struct snd_kcontrol *kcontrol,
 	return 0;
 }
 
-static const struct soc_enum ams_delta_audio_enum[] = {
-	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(ams_delta_audio_mode),
-						ams_delta_audio_mode),
-};
+static const SOC_ENUM_SINGLE_EXT_DECL(ams_delta_audio_enum,
+				      ams_delta_audio_mode);
 
 static const struct snd_kcontrol_new ams_delta_audio_controls[] = {
-	SOC_ENUM_EXT("Audio Mode", ams_delta_audio_enum[0],
+	SOC_ENUM_EXT("Audio Mode", ams_delta_audio_enum,
 			ams_delta_get_audio_mode, ams_delta_set_audio_mode),
 };