x86: SATA ATAPI Support in AHCI Driver

This driver enhancement is new in the Developer 1/08 release.

The AHCI driver supports SATA ATAPI CD/DVD devices. Users can use the SATA CD/DVD in AHCI mode instead of the compatible mode. The AHCI mode has better error handling and hot-plug capabilities.

For more information, see the ahci(7D) man page.