haiku_loader.riscv: update for SMP support

Change-Id: Ic3f83e80347036727a06eb6199c44e00079fb304
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4715
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

haiku_loader.riscv: update

* Moved machine mode code from kernel.
* Added MMU page table generation.
* Added QEMU ramfb video driver.

Change-Id: Icd67cd2e8dbf2b568d81ab8dd0d6127ca3cd97a8
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4302
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

system/boot: add optional alignment to kernel_args_malloc

* A few things need alignment, instead of forcing them all
to align themselves, support alignment of the kernel_args
* Default of 1 is "no alignment"

Change-Id: Iff05dcec8adaa963c8444d701464ea11616062f6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4698
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

libfdt: Upgrade to 1.6.1 plus a few commits

* Catch errors and report them in bus parsing code
* Align the FDT kernel_arg to 8-bytes
* we still choose BSD-2-clause :-)

Change-Id: If2a88b7f131025ff1c1a2d903ed52f039e5bbcb5
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4694
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

haiku_loader: initial support for RISC-V TinyEMU

Change-Id: Ie102f466725f45072db25a9629fa8e28526484eb
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3882
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>