Pad 0 to align outputs
Add version 1 of SMC 2862WG adapter which is USB 1.0
regen
Switch powerpc64 architectures over to gcc 4.8.
OK: mrg@
Add version 1 device of SMC 2862WG accordingly.
For the moment, don't complain about const casts.
Explain that tests should be run as root, and that in theory it's ok
to run them multiuser.

Discussed on current-users with in put from martin@ and gson@.
Always NULL terminate the argv[] array. From OpenBSD.
Don't map the GEM uvm_aobj copy-on-write -- what was I thinking?

Do transfer the GEM object reference to the uvm_aobj reference --
these are not the same thing.  (There's another uvm object whose
references are the same thing as the GEM object references, but
that's not the uao.)

With these changes, it looks like the GPU is no longer trying to draw
graphics all over kernel data structures.  Wish I had that month of
debugging back!
Oops -- drop the GEM object reference on error too.
Split large paragraph about uobj/uoffset into a bulleted list.

Mention that uvm_map doesn't add a reference to uobj.  Evidently this
information is important, since I just wasted countless hours over
the past months investigating kernel memory corruption arising from a
failure to notice this fact.
Miscellaneous markup, speling and grammar fix.
Miscellaneous little fixes for harmless issues:

- Fix sense of subtraction in i915_gem_restore_gtt_mappings (not
  currently used, so this was harmless).

- Program gtt->gtt_scratch_map->dm_segs[0].ds_addr rather than
  gtt->gtt_scratch_seg.ds_addr into the GTT for consistency with the
  bus_dma API.  These are currently the same, but if we ever start
  using x86 iommu perhaps that may change.

- Kassert that the scratch PTE decodes into the scratch address.
Recognize racd* as boot device.