qcacmn: Fix large RX desc pool memory allocation

During dp_rx_pdev_attach and dp_rx_pdev_mon_buf_attach we are allocating
three times as many rx descriptors as there are entries in the ring for
AP usecase. This is not needed for MCL and may need to kmalloc
failures for allocating that much contiguous memory

Allocate only as many RX descriptors as there are ring entries for MCL
usecase.

Change-Id: I8b559a85c3899bcbdc520e71ba5da409314db160
CRs-Fixed: 2342957

dp/wifi3.0/dp_rx_desc.c

@@ -36,13 +36,13 @@ QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id,
 	uint32_t i;
 
 	rx_desc_pool->array =
-		qdf_mem_malloc(pool_size*sizeof(union dp_rx_desc_list_elem_t));
+			qdf_mem_malloc(pool_size *
+				       sizeof(union dp_rx_desc_list_elem_t));
 
 	if (!(rx_desc_pool->array)) {
 		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_FATAL,
 			"%s: RX Desc Pool[%d] allocation failed",
 			__func__, pool_id);
-
 		return QDF_STATUS_E_NOMEM;
 	}