sound updates for 4.9-rc1

Again the diffstat shows a widely distributed pattern at this cycle,
as there've been many code cleanups and refactoring allover the places.
Other than that, the development was relatively calm, and no big
surprise shouldn't be expected.  Here are some highlights:

Core:
- Sequencer code refactoring / documentation updates
- TLV code moved to uapi, following some relevant cleanups

USB-Audio:
- Lots of LINE6 driver fixes / updates
- DragonFly and TEAC device quirk updates

HD-audio:
- Usual fixupes for Dell, Lenovo and HP machines
- Link-audio time reporting capability

ASoC:
- Large refactoring of simple-card code to be shared with rcar
  driver
- Removal of some duplicated ops over lots of CODEC drivers
- Again quite a few Intel SKL driver updates
- New drivers for Nuvoton NAU88C10, Realtek RT5660 and RT5663
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