msm: audio: qdsp6v2: Fix acdb driver memory management

Allocation & deallocation of column info structure is wrong.
Move allocation to register memory and deallocation to
deregister memory.

Change-Id: I2ee1745074881cfc5980928c70244aa9b974293a
CRs-fixed: 423494
Signed-off-by: Ben Romberger <bromberg@codeaurora.org>