sound fixes for 3.14-rc1

The big chunks here are the updates for oxygen driver for Xonar DG
devices, which were slipped from the previous pull request.  They are
device-specific and thus not too dangerous.

Other than that, all patches are small bug fixes, mainly for Samsung
build fixes, a few HD-audio enhancements, and other misc ASoC fixes.
(And this time ASoC merge is less than Octopus, lucky seven :)
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