asoc: Register CDC_DMA interface only if enabled

Register for the widgets and interconnections in routing
driver only when the respective interfaces are supported.
Add config based approach for CDC_DMA interface.

Change-Id: I56a8a3c14896cd1e267a4099e90ca480d13e2d6f
Signed-off-by: Subhadra Jagadeesan <subhja@codeaurora.org>