soc: qcom: llcc: Add manager for llcc tcm

Both ethernet and USB need a way to coordinate usage of the tightly
coupled memory (TCM) region in the llcc. To this extent, provide a manager
for this region which can map this region for the kernel and provide
information for using it to clients, while also ensuring that
only one client can use the region at a time.

Change-Id: I57c02b1be6135fb9d93e638959084d0d5db48500
Signed-off-by: Melody Olvera <molvera@codeaurora.org>