Revert "ALSA: pcm: Fix races among concurrent read/write and buffer changes"

This reverts commit 47711ff1.

It will come back after the next ABI break as it is needed to resolve
CVE-2022-1048.  But for now, while testing, it can be reverted in order
to preserve the ABI.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I5d4a52d443cffa34c8550b83c90d11a69da09cfc