kern/test: add wip qemu-virt board support to mesosphere

kernel_ldr: bring initial cache flush in line with Nintendo

kern: reflect nintendo cache management behavior for initial processes

kern: devirtualize KReadableEvent::Reset, KWorkerTask::DoWorkerTask

kern: devirtualize most things that are free to devirtualize (see #1672)

kern: use optimized red black tree finds for remaining holdouts

kern: devirtualize several KAutoObject functions

kern: KCacheHelper: better reflect nintendo coremask clearing logic

kern: devirtualize remaining vcall for class token/dyncast

kern: avoid constexpr init for many objects (avoids unnecessary memory clear) (#1668)

kern: use new AtomicRef, use Atomic<bool>

util: better match true std::atomic semantics

kern/util: use custom atomics wrapper to substantially improve codegen

kern: use 13.0.0 revised KLightLock logic

kern: fix capability check for thread priorities

kern: update scheduler for 13.0.0 change, fix some ctz/clz bugs

kern: fix use of plr vs plr_heap, fix close/unlock order in ArbitrateLock

ams: improve offsetof style consistency

kern: devirtualize KAutoObject::DynamicCast<>() ...

This is an optimization that saves the most common type of virtual call in the kernel (DynamicCast)
by storing class token as a member, rather than getting it via virtual call every time.

This does not currently cost any memory space on 64-bit targets, due to pre-existing padding space.

This optimization can be turned off via a compile-time flag for accuracy.

kern/util: update structure layouts to match Nintendo (saves 0x10 per KThread/KSession)

kern: fix some lingering non-m_ member variables

ams: replace most remaining operator & with std::addressof

strat: refactor address taking of form &var[...]

svc: refactor/rename MemoryInfo fields

strat: remove map namespace, svc: add address space defs

ams: the copyright^H^H^H^H^H^H^Hmplex plane is the algebraic closure of the reals

kern: devirtualize page table operations

kern: unify all waiting semantics to use single api

kern/svc: implement IoPool/Region svc support

svc/kern/dd: remove MapDeviceAddressSpace()