qcacmn: Reuse Rx Descriptor Pool Array

wifi up/down will cause soc stop and soc
start which will allocate rx desc pool
array memory for each wifi up

This creates memory fragmentation issue
hence reuse Rx descriptor pool array
across wifi up/down and free only nbufs

CRs-Fixed: 2394666
Change-Id: Ic897c733dfba3d8829e2f2f51099cd615b8a7ea2

dp/wifi3.0/dp_rx.h

@@ -364,6 +364,9 @@ void dp_rx_desc_pool_free(struct dp_soc *soc,
 				uint32_t pool_id,
 				struct rx_desc_pool *rx_desc_pool);
 
+void dp_rx_desc_nbuf_pool_free(struct dp_soc *soc,
+			       struct rx_desc_pool *rx_desc_pool);
+
 void dp_rx_deliver_raw(struct dp_vdev *vdev, qdf_nbuf_t nbuf_list,
 				struct dp_peer *peer);