Enable DMI00[1-4] for Dasharo (coreboot+SeaBIOS)

[pietrushnic]

It seems to depend only on Boot System Or From Connected Disk, which uses some SEABIOS variables.

This seems to be a good first candidate for enabling Dasharo (coreboot+SeaBIOS) on QEMU Q35.

There are following issues to achieve correct results:

• Support for QEMU Q35 and OS installation should be enabled
  The current implementation of qemu-run.sh assumes either firmware (seabios|uefi), OS (OS testing), or OS_install (OS installation). Firmware has more minor memory requirements than OS.
• Support for running qemu-run.sh on remote target
  • I'm also in a VM, so various accelerations would not work. For my setup to make things work, I need to start the emulator on a remote bare metal machine or as a separate VM in Qubes OS/xcp-ng, which could make things even more scalable.
  • Starting in Qubes has the problem of compromising system security (telnet port, etc.), so there are better ideas than this.
    Starting on xcp-ng, we may have issues exposing the resources we currently use (BIOS file, QEMU monitor, telnet connection), but this is worth discussing with the CP community.
  • Bare metal is most straightforward for now.