This commit adds support to Ai-Thinker ESP32 Audio Kit V2.2 A247
board.
There are two modules of this board. The old model uses AC101 audio
and is not supported currently (AFAIK there is no AC101 driver) and
the new version uses the ES8388 audio codec. This model is supported
by this commit.
Just read the documentation to test playing an audio file.
TODO: Test audio recording.
Alan Carvalho de Assis