config: sdm450: Disable CDC_DMA interfaces

Added configs to disable CDC_DMA interface in sdm450 autoconf.
This is done to disable mixer controls and related
intercon routes in routing driver to avoid registration of
unnecessary sound controls to optimize audio sound card loading.

Change-Id: I6040f5f8ff5c0e09960bbb0332c7890f2b183f04
Signed-off-by: Subhadra Jagadeesan <subhja@codeaurora.org>