sound fixes for 4.8-rc6

We've got quite a few fixes at this time, and all are stable patches.
syzkaller strikes back again (episode 19 or so), and we had to plug
some holes in ALSA core part (mostly timer).  In addition, a couple of
FireWire audio fixes for the invalid copy user calls in locks, and a
few quirks for HD-audio and USB-audio as usual are included.
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