* texture_cache/surface_params: Remove unused local variable

* rasterizer_interface: Add missing documentation commentary

* maxwell_dma: Remove unused rasterizer reference

* video_core/gpu: Sort member declaration order to silent -Wreorder warning

* fermi_2d: Remove unused MemoryManager reference

* video_core: Silent unused variable warnings

* buffer_cache: Silent -Wreorder warnings

* kepler_memory: Remove unused MemoryManager reference

* gl_texture_cache: Add missing override

* buffer_cache: Add missing include

* shader/decode: Remove unused variables

RasterizerInterface was considered an incomplete object by clang.

Implement VOTE using Nvidia's intrinsics. Documentation about these can
be found here
https://developer.nvidia.com/reading-between-threads-shader-intrinsics

Instead of using portable ARB instructions I opted to use Nvidia
intrinsics because these are the closest we have to how Tegra X1
hardware renders.

To stub VOTE on non-Nvidia drivers (including nouveau) this commit
simulates a GPU with a warp size of one, returning what is meaningful
for the instruction being emulated:

* anyThreadNV(value) -> value
* allThreadsNV(value) -> value
* allThreadsEqualNV(value) -> true

ballotARB, also known as "uint64_t(activeThreadsNV())", emits

VOTE.ANY Rd, PT, PT;

on nouveau's compiler. This doesn't match exactly to Nvidia's code

VOTE.ALL Rd, PT, PT;

Which is emulated with activeThreadsNV() by this commit. In theory this
shouldn't really matter since .ANY, .ALL and .EQ affect the predicates
(set to PT on those cases) and not the registers.

We can simply enable CMAKE_AUTOUIC and let CMake take care of handling
the UI code generation for targets.

As part of letting CMake automatically handle the header file parsing,
we must not name includes with "ui_*" unless they're related to the
output of the Qt UIC compiler. Because of this, we need to rename
ui_settings, given it would conflict with this restriction.

Following screens got fixes:
- Configure/Debug
- Configure/Input

Prevents an invalid formatting exception from being thrown.

Gets rid of a compilation warning.

This commit ensures that the host gpu is constantly fed with commands to
work with, while the guest gpu keeps producing the rest of the commands.
This reduces syncing time between host and guest gpu.

This commit fixes offsets on Linear -> Tiled copies, corrects z pos
fortiled->linear copies, corrects bytes_per_pixel calculation in tiled
-> linear copies and relaxes some limitations set by latest dma fixes
refactors.

This commit takes care of implementing the F16 Variants of the 
conversion instructions and makes sure conversions are done.

This commit ensures that all backing memory allocated for the Guest CPU
is aligned to 256 bytes. This due to how gpu memory works and the heavy
constraints it has in the alignment of physical memory.

Audio devices use the supplied revision information in order to
determine if USB audio output is able to be supported. In this case, we
can only really handle using this revision information in
ListAudioDeviceName(), where it checks if USB audio output is supported
before supplying it as a device name.

A few other scenarios exist where the revision info is checked, such as:

- Early exiting from SetAudioDeviceOutputVolume if USB audio is
  attempted to be set when that device is unsupported.

- Early exiting and returning 0.0f in GetAudioDeviceOutputVolume when
  USB output volume is queried and it's an unsupported device.

- Falling back to AHUB headphones in GetActiveAudioDeviceName when the
  device type is USB output, but is unsupported based off the revision
  info.

In order for these changes to also be implemented, a few other changes
to the interface need to be made.

Given we now properly handle everything about ListAudioDeviceName(), we
no longer need to describe it as a stubbed function.

The revision querying facilities are used by more than just audren. e.g.
audio devices can use this to test whether or not USB audio output is
supported.

This will be used within the following change.

Trims out the lingering reliance on global state out of the audio code.

This service function only ever returns a result and nothing more.