sound fixes for 5.1-rc3

The important fixes at this time are a couple fixes in ALSA core:
a fix for PCM is about the OOB access in PCM OSS plugins that has
been for long time, but hasn't hit so often until now just because
we allocated a large buffer via vmalloc(), and surfaced more often
after switching to kvmalloc().  Another fix is for a long-standing
PCM problem wrt racy PM resume.  Others are trivial nospec coverage
and usual HD-audio quirks.
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