boot: ARM64 EFI port

* MMU mapping
* EL2 to EL1 transition (FreeBSD/Jaroslaw Pelczar)
* Initial implementation for cache cleaning and TLB invalidations (ARM)
* Processor Helper functions
* Additional Logging in boot process

Change-Id: Idcee93583418a3c3528c5d9586d3add487f9d5ca
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4888
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>