qcacmn: MCL Buffer Replenishment

Add support for replenishing the rx buffers using the host to
firmware buffer ring.

This includes adding a flag QCA_HOST2FW_RXBUF_RING:
When QCA_HOST2FW_RXBUF_RING is enabled the host will do the following:
- Allocate the refill buffer ring (HTT_HOST1_TO_FW_RXBUF_RING) and
populate it with
 rx buffers
- Send the refill buffer ring configuration to the firmware
- Allocate the rx DMA ring (HTT_RXDMA_HOST_BUF_RING), leave it empty.
- Send the rx DMA ring configuration to the firmware

When QCA_HOST2FW_RXBUF_RING is disabled, the host will do the following:
- Allocate the rx DMA ring (HTT_RXDMA_HOST_BUF_RING), and populate it with
 rx buffers
- Send the rx DMA ring configuration to the firmware

CRs-Fixed: 1074199
Change-Id: Iec05a973cd9d628c742e3aaa16b8dabc7797625d

dp/wifi3.0/dp_rx_desc.c

@@ -32,7 +32,7 @@ QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id)
 {
 	uint32_t i;
 	struct dp_pdev *dp_pdev = soc->pdev_list[pool_id];
-	struct dp_srng *rxdma_srng = &dp_pdev->rxdma_buf_ring;
+	struct dp_srng *rxdma_srng = &dp_pdev->rx_refill_buf_ring;
 
 	soc->rx_desc[pool_id].array = qdf_mem_malloc(
 		((rxdma_srng->alloc_size/hal_srng_get_entrysize(soc->hal_soc,