ASoC: tlv320aic31xx: Remove duplicate const

SOC_ENUM_SINGLE_DECL() already adds the const qualifier, so there is no need to
manually specify it.

Fixes the following warnings from sparse:
	sound/soc/codecs/tlv320aic31xx.c:253:1: warning: duplicate const
	sound/soc/codecs/tlv320aic31xx.c:255:1: warning: duplicate const
	sound/soc/codecs/tlv320aic31xx.c:257:1: warning: duplicate const
	sound/soc/codecs/tlv320aic31xx.c:260:1: warning: duplicate const
	sound/soc/codecs/tlv320aic31xx.c:262:1: warning: duplicate const

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/codecs/tlv320aic31xx.c

@@ -249,17 +249,16 @@ static const char * const mic_select_text[] = {
 	"Off", "FFR 10 Ohm", "FFR 20 Ohm", "FFR 40 Ohm"
 };
 
-static const
-SOC_ENUM_SINGLE_DECL(mic1lp_p_enum, AIC31XX_MICPGAPI, 6, mic_select_text);
-static const
-SOC_ENUM_SINGLE_DECL(mic1rp_p_enum, AIC31XX_MICPGAPI, 4, mic_select_text);
-static const
-SOC_ENUM_SINGLE_DECL(mic1lm_p_enum, AIC31XX_MICPGAPI, 2, mic_select_text);
-
-static const
-SOC_ENUM_SINGLE_DECL(cm_m_enum, AIC31XX_MICPGAMI, 6, mic_select_text);
-static const
-SOC_ENUM_SINGLE_DECL(mic1lm_m_enum, AIC31XX_MICPGAMI, 4, mic_select_text);
+static SOC_ENUM_SINGLE_DECL(mic1lp_p_enum, AIC31XX_MICPGAPI, 6,
+	mic_select_text);
+static SOC_ENUM_SINGLE_DECL(mic1rp_p_enum, AIC31XX_MICPGAPI, 4,
+	mic_select_text);
+static SOC_ENUM_SINGLE_DECL(mic1lm_p_enum, AIC31XX_MICPGAPI, 2,
+	mic_select_text);
+
+static SOC_ENUM_SINGLE_DECL(cm_m_enum, AIC31XX_MICPGAMI, 6, mic_select_text);
+static SOC_ENUM_SINGLE_DECL(mic1lm_m_enum, AIC31XX_MICPGAMI, 4,
+	mic_select_text);
 
 static const DECLARE_TLV_DB_SCALE(dac_vol_tlv, -6350, 50, 0);
 static const DECLARE_TLV_DB_SCALE(adc_fgain_tlv, 0, 10, 0);