hal: Add provision to select backend based on codec type

SLIMBUS_0 is the backend on 8952 external codec PLs.
Whereas TERT_MI2S is the backend on 8952 internal codec PLs.
Since both these PLs are supported on same code base,
provision is required to select backend based on codec type.

Change-Id: I9c0dd7d952ab9d6b9bf738074d97597622e09590