sound updates for 4.2-rc1

It was a busy development cycle at this time, as you can see a wide
range of changes in diffstat.  There are no big changes but many
refactoring and improvements.  Here we go some highlights:

* ALSA core:
- Procfs codes were cleaned up to use seq_file
- Procfs can be opt out via Kconfig (only for EXPERT)
- Two types of jack API were unified finally; now both kctl and input
  jack devs are handled via a single function call.

* HD-audio
- Continued code restructuring for the future ASoC driver; now HDA
  controller driver is split to a core helper module.
- Preliminary codes for Skylake audio support in HDA core.
- Proper i915 gfx power well management for SKL & co
- Enabled runtime PM as default for Intel HDMI/DP codecs
- Newer Tegra chip supports
- More quirks for Dell headsets, Alienware (with CA0132), etc.
- A couple of DRM ELD helper API functions

* ASoC
- Support for loading ASoC topology maps from firmware, intended to be
  used to allow self-describing DSP firmware images to be built which
  can map controls added by the DSP to userspace without the kernel
  needing to know about individual DSP firmwares
- Lots of refactoring to avoid direct access to snd_soc_codec where
  it's not needed supporting future refactoring
- Big refactoring, cleanup and enhancement for the Wolfson ADSP driver
- Cleanup series for TI TAS2552 and R-CAR drivers
- Fixes and improvements on RT56xx codecs
- Support for TI TAS571x power amplifiers
- Support for Qualcomm APQ8016 and ZTE ZX296702 SoCs
- Support for x86 systems with RT5650 and Qualcomm Storm
- Support for Mediatek AFE (Audio Front End) unit
- Other various small fixes to ASoC codec drivers

* Firewire
- Enhanced to allow non-blocking streams to use timestamp
  synchronization
- Improve support for DM1500 and BeBoBv3

* Misc
- Cleanup of old pci API functions over all PCI sound drivers
- Fix long-standing regression of the old powermac i2c setup
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