MFC r257199, r257200, r257217:

MFC r257199, r257200, r257217:

  Remove all #include <machine/pmap.h> from arm code.  It's already
  included by vm/pmap.h, which is a prerequisite for arm/machine/pmap.h
  so there's no reason to ever include it directly.

  Remove #include <machine/frame.h> from all the arm code that doesn't
  really need it.  That would be almost everywhere it was included.  Add
  it in a couple files that really do need it and were previously getting
  it by accident via another header.

  Remove the last dregs of trapframe_t.  It turns out only arm was using
  this type, so remove it to make arm code more consistant with other
  platforms.

git-svn-id: svn://svn.freebsd.org/base/stable/10@259329 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f