qcacmn: Add source ring for direct buffer rx module

Direct Buffer Receive provides the driver with a mechanism by which target
can transfer information directly into host memory via DMA.

DMA rings must be initialized and configured before they can be shared
to the target for transfer ot data. Host driver will use the HAL SRNG
APIs to create, initialize and configure the DMA rings.

Change-Id: I43cd39ccbb5f5069c9a14092459d5c88ea514dca
CRs-Fixed: 2157986
3 files changed