Import lldb as of SVN r194122

Sponsored by:	DARPA, AFRL
Fix up the link quality lookup and re-enable multi-rate retry.

This is a terrible solution that at least behaves mostly correctly.

It walks the currently active rate table looking for rates to match.
It assumes that the code matches the setup path in the link quality
setup code (much like the previous, much simpler but even more hackish
math did.)

It's O(n), but n<15, so we're okay for the time being.

Tested:

* Intel 5100, STA - 11a, 11n, 11bg modes.
Commit over some work to prepare the iwn(4) driver for further chipset
support.

* Extend the hardware base_params structure to include a bunch of hardware
  flags indicating what is and isn't supported.

* Convert a bunch of the initial hardware configuration conditionals to
  consult the base_params structure.

* Add new calibration code for temperature calibration for the Centrino 2xxx
  series NICs.

* Add new bluetooth coexistence code for Centrino 2xxx series NICs.

* For NICs that support PAN (personal area networking), use a different
  transmit queue and command queue setup, in preparation for said
  PAN support.

* Extend the calibration array in iwn_softc to include enough space for
  the new calibration types.

Tested (by myself, if not mentioned):

* Intel 4965
* Intel 5100
* Intel 6150
* Intel 2230
* Intel 2200 (eadler)
* Intel 1030
* Intel 6200
* Intel 6230
* Intel 6250
* Intel 6150
* Intel 100

What doesn't work:

* Intel 6235 - fails in calibration at startup

TODO:

* Testing on Intel 53xx series hardware

Submitted by:	Cedric Gross <cg@cgross.info>
Add IDs for the ASIX 88179 and 88178A USB to GigE adapters.
Avoid overflow for the page counts.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Mention acl_get_brand_np(3).

MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Fix description to actually make sense.

Sponsored by:	The FreeBSD Foundation
Fix typo.

Sponsored by:	The FreeBSD Foundation
Adds gpioiic.4 and gpioled.4 man pages.  Moves some of the information that
was previously available on gpio.4 to their respectives pages.  Add the
cross references on gpioctl.8.

Approved by:	adrian (mentor)
As all the IIC controllers on system uses the same 'iichb' prefix we cannot
rely only on checking the device unit to indentify the BSC unit we are
attaching to.  Make use of the device base address to identify our BSC unit.

Approved by:	adrian (mentor)
Fix a typo on a comment in ofw_bus_if.m, the default method will return -1
when a node doesn't exist.

Reviewed by:	nwhitehorn
Approved by:	adrian (mentor)
Move the KASSERT() check to the point before the increase of number of pins.

Approved by:	adrian (mentor)
Just disable recoding support in libsmb if built WITHOUT_ICONV.
Fix gpiobus to return BUS_PROBE_GENERIC insted of BUS_PROBE_SPECIFIC (0) so
it can be overriden by its OFW/FDT version.

Give a chance for GPIO devices that implement the device_identify method to
attach.

Approved by:	adrian (mentor)
Actually add IOMMU domain to the list of known mappings. This fixes a bug
where multiple devices in the same IOMMU domain would be allocated
conflicting mappings unless they also shared a DMA tag.

MFC after:	3 days
Following the approach with ACPI DMAR on x86, split IOMMU handling into
a variant PCI bus instead of trying to shoehorn it into the PCI host bridge
adapter. Besides matching better the architecture on other platforms, this
also allows systems with multiple partitionable endpoints per PCI host
bridge to work correctly.
Noted that the stripe_size argument was not being displayed in the usage
message

MFC after:	2 weeks
Update LLDB to upstream r194122 snapshot

ludes minor changes relative to upstream, for compatibility with
FreeBSD's in-tree LLVM 3.3:

- Reverted LLDB r191806, restoring use of previous API.
- Reverted part of LLDB r189317, restoring previous enum names.
- Work around missing LLVM r192504, using previous registerEHFrames API
  (limited functionality).
- Removed PlatformWindows header include and init/terminate calls.

Sponsored by:	DARPA, AFRL
Fix a typo: s/wriable/writable/
Eliminate the gratuitous use of mmap(2) flags from the implementation
of kern_shmat().  Use a simpler approach to determine whether to pass
VMFS_NO_SPACE or VMFS_OPTIMAL_SPACE to vm_map_find().