x86: Solaris Audio Driver for ATI IXP400

The audioixp driver is the Solaris audio driver for the ATI IXP400 Southbridge chipset from ATI Corporation. The ATI IXP400 chipset includes an embedded AC97 audio controller. This chipset is widely adopted by many motherboard vendors, for example, the Ferrari4000 model. The audioixp driver follows the Solaris Audio Driver Architecture (SADA) frame.