pc-bios: document the edk2 firmware images; add firmware descriptors
Update the README file with information on the images added previously,
and provide firmware descriptor documents that conform to
"docs/interop/firmware.json".
Signed-off-by: Laszlo Ersek <[email protected]>
Reviewed-by: Michal Privoznik <[email protected]>
Reviewed-by: Michael S. Tsirkin <[email protected]>
Tested-by: Igor Mammedov <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Igor Mammedov <[email protected]>