Update notes for submitted changes

* hal: Offload bugfixes
* hal: Featureize FLAC offload support
* hal: Add multiple offload support for msm8974
* policy: Add support for multiple instances of offload playback
* hal: add support for pcm_ioctl() api
* Audio: Fix for sound card status overwrite issue
* hal: Support for FLAC 24 bit format in offload path