arm64: update linker script for kernel

Change-Id: Icf53d6ce1940dedebf218a6b68531aebf4c896b5
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5207
Reviewed-by: X512 <danger_mail@list.ru>
Reviewed-by: <oliver.ruiz.dorantes@gmail.com>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

ARM64 kernel.ld WIP, some cleanup, remove pe header

arm64: Add missing kernel linker script

Change-Id: If06134a75c382fbbd5658e8a0951842670bf71ac
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2818
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>