qemu_v8: switch to compile UEFI from EDK2 upstream

* Switches to compile UEFI from EDK2 upstream.
* Passes -no-acpi to QEMU when starting to make UEFI pass the FDT to the kernel

Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>