ENH: Support for 32 AHCI HDs on single PCI slot on 12-CUR
ENH: Support for 32 AHCI HDs on single PCI slot on 12-CUR

r302459 - Allow AHCI controller to support up to 32 arbitrary devices.
https://secure.freshbsd.org/commit/freebsd/r302459

While bhyve still accepts the old syntax, after the 8th PCI function an
error is given by bhyve and the guest fails to start. So specific
handling had to be written just for the new syntax. All 12-CURRENT
guests use the new syntax for ahci-hd devices.

chyves/chyves