Add ES8388 codec support via ES8323 driver on I2C7 with:
- Headphones on LOUT2/ROUT2 with jack detection
- Speaker via CS8120 amplifier on LOUT1/ROUT1
- Onboard microphone and microphone jack inputs
- MCLK routed through I2S0_8CH_MCLKOUT_TO_IO gate clock
- Default mixer state via asound.state
- Board config: add current kernel target, update description