Update notes for submitted changes

* hal: Featureize FLAC offload support
Update notes for submitted changes

* hal: Offload bugfixes
Update notes for submitted changes

* hal: Extend MULTIPLE_OFFLOAD_ENABLED ifdef
Update notes for submitted changes

* hal: PCM offload shouldn't enable all types of offloading
Update notes for submitted changes

* hal: Fix the samplerate/bitwidth comparison