TSC: support new TSC HW unit

TSC (Transport Stream Controller) is a new HW unit designed to support
two major functionalities:
Mux: enable the routing of the MPEG transport streams from multiple
sources to multiple destinations.
CI: communication with the internal Conditional Access Module (CAM) over
Common Interface (CI).
The TSC driver supports the TSC HW unit, enabling the functionality it
provides.

Change-Id: I92e250fbd149644afbc65dd4dc6f92cca061a9a9
Signed-off-by: Anat Etzion-Fuchs <aetzion@codeaurora.org>