[kernel][formatting] Formatting pass on core kernel code

Also ran through 'astyle -j -A2' prior to running through clang-fmt,
which adds braces to one line conditionals.

Tested: build and runtests on arm and x86

Change-Id: I888c1ce43dbe12a936a3f13d89c5f8dc16ccab6a

[kernel][vm] Use "status != ZX_OK" pattern instead of "status < 0"

"status != ZX_OK" is the preferred and most common pattern for
checking for an error status. "status < 0" is less common and not
preferred, so convert instances of that in kernel/vm/ to use the
preferred pattern.

Bug: none
Test: runtests
Change-Id: Ie04c9a23b416d5b614ce192329fb51c453a8e155

[kernel] Lockdep instrument the vm and thread_lock.

- Instrument the locks used by the vm.
- Instrument the thread lock and remainning core kernel code.
- Leaving remaining arch/lib/driver code for a later CL.

Bug: ZX-23
Test: k ut all and system/test/* pass + manual testing.

Change-Id: Ie3f6a27e81bcd1890d63f2fafda3ee233f7969ef

[kernel][vmo][cached] Allow setting cache policy on regular paged VMOs

Only works for plain vmos, and then only if they're not cloned, mapped,
or committed in any way.

Currently sets the cache parameters for all mappings, but will work
towards requiring the caller match the cache policy.

ZX-1213 #progress

Change-Id: Ie3e30f66048a844e48385b628373121f8bd18d44

[kernel][vm] move from safeint to compiler intrinsics

See ZX-1747

Change-Id: I3f72212fef3e92a86074ac1568a352d2b3da5d85

[kernel][vmo] page align the size of vmos

During creation or resize, always snap the size of the VMO to the
next page size boundary.

This will allow us to easily add more types of vmo clones and generally
sidestep a bunch of undefined situations concerning the partial last
page.

ZX-1622 #done

Change-Id: I4c60509e7b17d39c48fbbae998a34c98f25a7f3e

[kernel][vm] Implement VmObjectPhysical::Lookup

This will allow easier introspection of the underlying address range.

Change-Id: I9f15368092568a9a114ca40ed11f0f4e125983eb

[user_ptr] Enforce IN/OUT/INOUT semantics

Change-Id: I54e92ed999c1965114aa80aeffe8d0fc16184b40

[kernel][vm] move vm.h to the new spot and remove some unused code

Change-Id: I69f1b804fb95dd44e3e0619943e8809519aa82ca

[kernel][vm][formatting] mostly reordering includes after the rename

Change-Id: I8d94a8580ddd0233e036475bd6d4603f5881614f

[vm][zx_status_t] Use zx_status_t throughout the vm layer

Change-Id: If40e2571cdbd382b7b90da90cdef40daf07a2bd0

[zx] Magenta -> Zircon

The Great Renaming is here!

Change-Id: I3229bdeb2a3d0e40fb4db6fec8ca7d971fbffb94

[zircon][mxtl->fbl] Rename mxtl to fbl

Change-Id: Ie21b6498e1bfb0a7fa0315e40b9e5c3ee78646be

[kernel][vm] move kernel/kernel/vm to just kernel/vm

Change-Id: I8f724a9f8a61415712661d1fdd3dc4e1c70cf620