ASoC: 88pm860x: remove unused variables 'pcm_switch_controls' and 'aif1_mux'

sound/soc/codecs/88pm860x-codec.c:533:38: warning:
 pcm_switch_controls defined but not used [-Wunused-const-variable=]
sound/soc/codecs/88pm860x-codec.c:560:38: warning:
 aif1_mux defined but not used [-Wunused-const-variable=]

They are never used, so can be removed.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190815092547.29564-1-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/88pm860x-codec.c

@@ -529,10 +529,6 @@ static const struct snd_kcontrol_new pm860x_snd_controls[] = {
  * DAPM Controls
  */
 
-/* PCM Switch / PCM Interface */
-static const struct snd_kcontrol_new pcm_switch_controls =
-	SOC_DAPM_SINGLE("Switch", PM860X_ADC_EN_2, 0, 1, 0);
-
 /* AUX1 Switch */
 static const struct snd_kcontrol_new aux1_switch_controls =
 	SOC_DAPM_SINGLE("Switch", PM860X_ANA_TO_ANA, 4, 1, 0);
@@ -549,17 +545,6 @@ static const struct snd_kcontrol_new lepa_switch_controls =
 static const struct snd_kcontrol_new repa_switch_controls =
 	SOC_DAPM_SINGLE("Switch", PM860X_DAC_EN_2, 1, 1, 0);
 
-/* PCM Mux / Mux7 */
-static const char *aif1_text[] = {
-	"PCM L", "PCM R",
-};
-
-static SOC_ENUM_SINGLE_DECL(aif1_enum,
-			    PM860X_PCM_IFACE_3, 6, aif1_text);
-
-static const struct snd_kcontrol_new aif1_mux =
-	SOC_DAPM_ENUM("PCM Mux", aif1_enum);
-
 /* I2S Mux / Mux9 */
 static const char *i2s_din_text[] = {
 	"DIN", "DIN1",