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Staging drivers patches for 3.20-rc1

Here's the big staging driver tree update for 3.20-rc1.  Lots of little
things in here, adding up to lots of overall cleanups.  The IIO driver
updates are also in here as they cross the staging tree boundry a lot.
I2O has moved into staging as well, as a plan to drop it from the tree
eventually as that's a dead subsystem.

All of this has been in linux-next with no reported issues for a while.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

- use the atomic helpers for plane_upate/disable hooks (Matt Roper)
- refactor the initial plane config code (Damien)
- ppgtt prep patches for dynamic pagetable alloc (Ben Widawsky, reworked and
  rebased by a lot of other people)
- framebuffer modifier support from Tvrtko Ursulin, drm core code from Rob Clark
- piles of workaround patches for skl from Damien and Nick Hoath
- vGPU support for xengt on the client side (Yu Zhang)
- and the usual smaller things all over

IOMMU Updates for Linux v3.20

This time with:

	* Generic page-table framework for ARM IOMMUs using the LPAE page-table
	  format, ARM-SMMU and Renesas IPMMU make use of it already.

	* Break out of the IO virtual address allocator from the Intel IOMMU so
	  that it can be used by other DMA-API implementations too. The first
	  user will be the ARM64 common DMA-API implementation for IOMMUs

	* Device tree support for Renesas IPMMU

	* Various fixes and cleanups all over the place

Fairly small update, but there are some interesting new features.

Common: Optional support for adding a small amount of polling on each HLT
instruction executed in the guest (or equivalent for other architectures).
This can improve latency up to 50% on some scenarios (e.g. O_DSYNC writes
or TCP_RR netperf tests).  This also has to be enabled manually for now,
but the plan is to auto-tune this in the future.

ARM/ARM64: the highlights are support for GICv3 emulation and dirty page
tracking

s390: several optimizations and bugfixes.  Also a first: a feature
exposed by KVM (UUID and long guest name in /proc/sysinfo) before
it is available in IBM's hypervisor! :)

MIPS: Bugfixes.

x86: Support for PML (page modification logging, a new feature in
Broadwell Xeons that speeds up dirty page tracking), nested virtualization
improvements (nested APICv---a nice optimization), usual round of emulation
fixes.  There is also a new option to reduce latency of the TSC deadline
timer in the guest; this needs to be tuned manually.

Some commits are common between this pull and Catalin's; I see you
have already included his tree.

ARM has other conflicts where functions are added in the same place
by 3.19-rc and 3.20 patches.  These are not large though, and entirely
within KVM.

This is the 3.18.7 stable release

This is the 3.14.33 stable release

This is the 3.10.69 stable release

Linux 3.19

This is the 3.18.6 stable release

This is the 3.14.32 stable release

This is the 3.10.68 stable release

This is the 3.4.106 stable release

Linux 3.19-rc7

- chv rps improvements from Ville
- atomic state handling prep work from Ander
- execlist request tracking refactoring from Nick Hoath
- forcewake code consolidation from Chris&Mika
- fastboot plane config refactoring and skl support from Damien
- some more skl pm patches all over (Damien)
- refactor dsi code to use drm dsi helpers and drm_panel infrastructure (Jani)
- first cut at experimental atomic plane updates (Matt Roper)
- piles of smaller things all over, as usual

IOMMU Fixes for Linux v3.19-rc6

Two small fixes for the Tegra GART IOMMU driver:

	* Provide a .map_sg function for iommu_ops
	* Do not register Tegra GART driver as a workaround because of
	  issues with it when used from DRM code

This is the 3.12.37 stable release

This is the 3.10.67 stable release

This is the 3.14.31 stable release