move acpi headers from x86 to non-arch

Change-Id: Ida6186af7a40fb7d91b4da92c36d25db30dadb33
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5484
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

boot/x86: move HPET initialization to arch folder

Change-Id: Iac3f4923f132c4c3328fde5af1dad75af5b2efbd
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4864
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>