Until gi-docgen is declared stable support either of them.
This effectively means that hand builds and CI builds will use
gi-docgen, but distro builds use gtk-doc-tools.
Add the IFD regions as child devices and set the region access on the child
devices. Also add read-only SPI descriptor as an HSI attribute and require
FLOCKDN on Intel hardware.
Use the hidden PCI 00:1f.5 device to set the SPIBAR automatically and generate
the quirk file automatically to support more hardware.
