sound fixes for 5.4-rc8 or final

A few small last-minute fixes for USB-audio and HD-audio as well
as for PCM core:

- A race fix for PCM core between stopping and closing a stream
- USB-audio regressions in the recent descriptor validation code
  and relevant changes
- A read of uninitialized value in USB-audio spotted by fuzzer
- A fix for USB-audio race at stopping a stream
- Intel HD-audio platform fixes
-----BEGIN PGP SIGNATURE-----
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=Xx2C
-----END PGP SIGNATURE-----