Revert "ALSA: control: Use deferred fasync helper"

This reverts commit 857ccedc which is
commit 4a971e84 upstream.

It breaks the Android GKI kernel abi, and is not needed for Android
devices, so revert it for now.  If it is needed for this branch, it can
come back later in an ABI-stable way.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I2763e9b54b1bd192d05abecb14c54bc4df46ea56