msm: audio: qdsp6v2: Add Qdsp6 proxy port driver

Proxy port driver is needed to get the data from
QDSP6 AFE Rx port.

Change-Id: I5dcc4504e9d6895c8cd5d6f378e3d5a3a9dac35a
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>
Signed-off-by: Sidipotu Ashok <sashok@codeaurora.org>