ASoC: msm: Add common custom topology interface

Add support for a common custom topology interface.
Command is sent through q6core driver. All ADSP
custom topologies are sent through this new
interface.

Change-Id: Iac6e5646cf3c4d6c45109c7861f8d22d4fb5f3ba
Signed-off-by: Ben Romberger <bromberg@codeaurora.org>