Revert "ASoC: dpcm: prevent snd_soc_dpcm use after free"

This reverts commit 71dc356a which is
commit a9764869779081e8bf24da07ac040e8f3efcf13a upstream.  It is needed
for Android but in this format, it breaks the ABI.  An ABI-stable
version will be added back to the tree in a later change.

Fixes: 71dc356a ("ASoC: dpcm: prevent snd_soc_dpcm use after free")
Cc: Will McVicker <willmcvicker@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I11e394d57418cd35de0801e34ba479ffce3eb81d