- Add ioctl method to enable allocating the apb buffer.
- Add RX methods to set data width, sample rate, channels and
for receiving data from the I2S peripheral.
- Update the i2schar defconfig to enable the I2S receiver.
- Add nxlooper defconfig to enable testing the RX interface.
- Add specific bindings on ESP32 bringup to enable nxlooper
to work without the need of any specific codec.
Add initial support for the I2S peripheral on ESP32.
Add I2S character driver and generic I2S audio driver.
Include i2schar defconfig for ESP32-DevKitC board.
