configs: scuba: Add BCS channel select mixer control

Add default value for BCS channel select mixer control
for BCS feature to work in scuba target.

Change-Id: Icbc9ab839e2a03afa9ad266e38f15a7f6748e9a9
diff --git a/configs/bengal/mixer_paths_scubaidp.xml b/configs/bengal/mixer_paths_scubaidp.xml
index 06454cf..09846c5 100644
--- a/configs/bengal/mixer_paths_scubaidp.xml
+++ b/configs/bengal/mixer_paths_scubaidp.xml
@@ -314,6 +314,7 @@
     <!-- TX Controls -->
     <ctl name="TX_CDC_DMA_TX_3 Channels" value="One" />
     <ctl name="DEC0_BCS Switch" value="0" />
+    <ctl name="BCS CH_SEL" value="SWR_MIC3" />
     <ctl name="MultiMedia1 Mixer TX_CDC_DMA_TX_3" value="0" />
     <ctl name="ADC2_MIXER Switch" value="0" />
     <ctl name="ADC2 MUX" value="ZERO" />