sound updates for 4.1-rc1

There have been major modernization with the standard bus: in ALSA
sequencer core and HD-audio.  Also, HD-audio receives the regmap
support replacing the in-house cache register cache code.  These
changes shouldn't impact the existing behavior, but rather
refactoring.

In addition, HD-audio got the code split to a core library part and
the "legacy" driver parts.  This is a preliminary work for adapting
the upcoming ASoC HD-audio driver, and the whole transition is still
work in progress, likely finished in 4.1.

Along with them, there are many updates in ASoC area as usual, too:
lots of cleanups, Intel code shuffling, etc.

Here are some highlights:

ALSA core:
- PCM: the audio timestamp / wallclock enhancement
- PCM: fixes in DPCM management
- Fixes / cleanups of user-space control element management
- Sequencer: modernization using the standard bus

HD-audio:
- Modernization using the standard bus
- Regmap support
- Use standard runtime PM for codec power saving
- Widget-path based power-saving for IDT, VIA and Realtek codecs
- Reorganized sysfs entries for each codec object
- More Dell headset support

ASoC:
- Move of jack registration to the card level
- Lots of ASoC cleanups, mainly moving things from the CODEC level
  to the card level
- Support for DAPM routes specified by both the machine driver and DT
- Continuing improvements to rcar
- pcm512x enhacements
- Intel platforms updates
- rt5670 updates / fixes
- New platforms / devices: some non-DSP Qualcomm platforms, Google's
  Storm platform, Maxmim MAX98925 CODECs and the Ingenic JZ4780 SoC

Misc:
- ice1724: Improved ESI W192M support
- emu10k1: Emu 1010 fixes/enhancement
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