V3 ABI tracking issue (device trees)

[mkroening]

• Add UEFI Platform / Rename Multiboot platform to BareMetal
• Move Multiboot detection to loader
  • Paging issues
• Move memory detection to loader
  • Add &'static [MemoryRegion]?
  • Convertible from UEFI
  • Creatable from BIOS/UEFI
• Move RSDP detection to loader
  • Add rsdp_addr: u64?
• Paging: Only map required areas uhyve#426
• Create device trees loader#275

pub type Entry =
    unsafe extern "C" fn(hart_id: usize, fdt: Option<NonNull<u8>>) -> !;

[mkroening]

CC: @sarahspberrypi

[jounathaen]

There is no reason for uhyve not to use device trees as well.
hermit-os/uhyve#756

[jounathaen]

Probably related #48