bullhead/audio: Modify combo path gain to fix speaker distortion

 - Change combo path speaker gain to 90 from 95

BUG=30180567

Change-Id: I6f4efc1aeeb679ef84eb10b36484f640e3d3c632
diff --git a/mixer_paths.xml b/mixer_paths.xml
index 1644b8a..f6c991d 100644
--- a/mixer_paths.xml
+++ b/mixer_paths.xml
@@ -1545,7 +1545,7 @@
     </path>
 
     <path name="spkr-gain-in-headphone-combo">
-        <ctl name="RX7 Digital Volume" value="95" />
+        <ctl name="RX7 Digital Volume" value="90" />
         <ctl name="SPK DRV Volume" value="8" />
     </path>