hal: configs: Fix sidetone mixer path for headset device

Fix sidetone mixer path for headset device to enable sidetone
during voice call on headset.

Change-Id: Icfb07737eb80d48b0600f4e311e6037e4ca13e45
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
diff --git a/configs/lahaina/mixer_paths.xml b/configs/lahaina/mixer_paths.xml
index 07ce7ed..6ae396d 100644
--- a/configs/lahaina/mixer_paths.xml
+++ b/configs/lahaina/mixer_paths.xml
@@ -2396,7 +2396,7 @@
     <path name="sidetone-headphones">
         <path name="sidetone-iir" />
         <ctl name="IIR0 INP0 Volume" value="54" />
-        <ctl name="IIR0 INP0 MUX" value="DEC2" />
+        <ctl name="IIR0 INP0 MUX" value="DEC0" />
         <ctl name="RX INT0 MIX2 INP" value="SRC0" />
         <ctl name="RX INT1 MIX2 INP" value="SRC0" />
     </path>