config: kona: update tx volume mixer controls for QRD kona device

update tx volume mixer controls for QRD kona device to meet tuning
requirement.

Change-Id: I0f87f5b5ad9b73a8f1fdb6a9aec3504c2727d153
diff --git a/configs/kona/mixer_paths_qrd.xml b/configs/kona/mixer_paths_qrd.xml
index 4a305ca..195f4e5 100644
--- a/configs/kona/mixer_paths_qrd.xml
+++ b/configs/kona/mixer_paths_qrd.xml
@@ -352,10 +352,10 @@
     <ctl name="HPHR Volume" value="20" />
     <ctl name="EAR SPKR PA Gain" value="G_DEFAULT" />
 
-    <ctl name="TX_DEC0 Volume" value="102" />
-    <ctl name="TX_DEC1 Volume" value="102" />
-    <ctl name="TX_DEC2 Volume" value="102" />
-    <ctl name="TX_DEC3 Volume" value="102" />
+    <ctl name="TX_DEC0 Volume" value="96" />
+    <ctl name="TX_DEC1 Volume" value="96" />
+    <ctl name="TX_DEC2 Volume" value="96" />
+    <ctl name="TX_DEC3 Volume" value="96" />
     <ctl name="TX_DEC4 Volume" value="84" />
     <ctl name="TX_DEC5 Volume" value="84" />
     <ctl name="TX_DEC6 Volume" value="84" />