Introduce Annapurna Labs AHCI support

Overview:

• implemented quirk for forcing SATA interface enable
• restore value to status register - this enables link autonegotiation

Modifications:

• devid:vendorid field
• quirk for forcing PI setting (BIOS is doing that on PC-like systems)
• write to capabilites field to enable phy link initialization

Submitted by: Wojciech Macek <wma@semihalf.com>
Reviewed by: imp, mav
Obtained from: Semihalf