Revert "ALSA: PCM: User contol API implementation"

This reverts commit cda3673c.
Remove multicopp changes.

Change-Id: I329cc07accba5664de71958fa6754057bba980e1
Signed-off-by: Damir Didjusto <damird@codeaurora.org>
Signed-off-by: Preetam Singh Ranawat <apranawat@codeaurora.org>