ASoC: cs4265: Add a MIC pre. route

The cs4265 driver is missing a microphone preamp enable.
This patch enables/disables the microphone preamp when mic
selection is made using the kcontrol.

Signed-off-by: Matt Flax <flatmax@flatmax.org>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs4265.c

@@ -221,10 +221,11 @@ static const struct snd_soc_dapm_route cs4265_audio_map[] = {
 	{"LINEOUTR", NULL, "DAC"},
 	{"SPDIFOUT", NULL, "SPDIF"},
 
+	{"Pre-amp MIC", NULL, "MICL"},
+	{"Pre-amp MIC", NULL, "MICR"},
+	{"ADC Mux", "MIC", "Pre-amp MIC"},
 	{"ADC Mux", "LINEIN", "LINEINL"},
 	{"ADC Mux", "LINEIN", "LINEINR"},
-	{"ADC Mux", "MIC", "MICL"},
-	{"ADC Mux", "MIC", "MICR"},
 	{"ADC", NULL, "ADC Mux"},
 	{"DOUT", NULL, "ADC"},
 	{"DAI1 Capture", NULL, "DOUT"},