sound fixes for 4.1-rc5

This batch became slightly large, just because I've been on vacation
for the last two weeks.  Nothing to scare much here, all device-specific
fixes, mostly small patches.

Majority of patches are for HD-audio, especially Dell machines.
The rest are small ASoC fixes for various codecs, and a USB-audio
quirk.

One PCM fix is included to ease the faulty condition checks in the
case of two periods PCM buffers.
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