ASoC: mc13783: Remove superfluous const

As SOC_ENUM_SINGLE_DECL() itself contains const modifier now, we can
reduce const from its users.
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/codecs/mc13783.c

@@ -430,7 +430,7 @@ static const struct snd_kcontrol_new samp_ctl =
 static const char * const speaker_amp_source_text[] = {
 	"CODEC", "Right"
 };
-static const SOC_ENUM_SINGLE_DECL(speaker_amp_source, MC13783_AUDIO_RX0, 4,
+static SOC_ENUM_SINGLE_DECL(speaker_amp_source, MC13783_AUDIO_RX0, 4,
 			    speaker_amp_source_text);
 static const struct snd_kcontrol_new speaker_amp_source_mux =
 	SOC_DAPM_ENUM("Speaker Amp Source MUX", speaker_amp_source);
@@ -439,7 +439,7 @@ static const char * const headset_amp_source_text[] = {
 	"CODEC", "Mixer"
 };
 
-static const SOC_ENUM_SINGLE_DECL(headset_amp_source, MC13783_AUDIO_RX0, 11,
+static SOC_ENUM_SINGLE_DECL(headset_amp_source, MC13783_AUDIO_RX0, 11,
 			    headset_amp_source_text);
 static const struct snd_kcontrol_new headset_amp_source_mux =
 	SOC_DAPM_ENUM("Headset Amp Source MUX", headset_amp_source);