configs: sdm660: Fix high voice RX gain in handset mode

For WSA8810, gain setting should be G_3_DB for handset
speaker mix control to achieve -9dB digital volume.
Update mixer control to G_3_DB in handset device.

CRs-Fixed: 2011146
Change-Id: If966ed1c91317a9e770a793e9dac151e3098baff
diff --git a/configs/sdm660/mixer_paths_mtp.xml b/configs/sdm660/mixer_paths_mtp.xml
index 307e557..f2f519b 100644
--- a/configs/sdm660/mixer_paths_mtp.xml
+++ b/configs/sdm660/mixer_paths_mtp.xml
@@ -1729,8 +1729,8 @@
     </path>
 
     <path name="handset">
+        <ctl name="EAR SPKR PA Gain" value="G_3_DB" />
         <path name="speaker-mono" />
-        <ctl name="EAR SPKR PA Gain" value="G_6_DB" />
     </path>
 
     <path name="handset-mic">