[PATCH] ahci: AHCI mode SATA patch for Intel ICH8

This patch adds the Intel ICH8 DID's to the ahci.c file for AHCI mode
SATA support.

Signed-off-by: Jason Gaston <Jason.d.gaston@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>