Update notes for submitted changes

* msm8660: Additional routing fixes
* msm8660: Add latency support for LPA
* msm8660: Use a larger sample buffer for LPA
* msm8660: Update audio policy
* audio/msm8660: Fix for pause and resume failure.
* audio/msm8660: Add support for Tunnel Playback.
* msm7627a/msm8660: Port heap mask change to ion
* msm8660: use policy manager from ALSA