AppNote: RZ/A1 Linux Audio codec driver porting guide

This document introduce how to porting the new audio code dirver onto RZ/A Linux BSP.

Contents:

• Introduce how to replace the driver of new audio codec in Linux BSP.
• Introduce how to use alsa-utils to control sound card.
• Hardware: RZ/A1H Application board(made by Regulus) with MAX9867ETJ.
• Code base: RSKRZA1-BSP-V1.3.0. (Original audio codec driver is MAX9856.)