qcacmn: Add scatter-gather support in RX path

Add nbufs to frag_list of parent nbuf when ever we receive
multiple MSDUs spread across nbufs.

Change-Id: Iff7a5208408fa55306cb4137e97bc781e1e82a01

dp/wifi3.0/dp_rx.h

@@ -284,6 +284,16 @@ uint32_t dp_rx_err_process(struct dp_soc *soc, void *hal_ring, uint32_t quota);
 uint32_t
 dp_rx_wbm_err_process(struct dp_soc *soc, void *hal_ring, uint32_t quota);
 
+void
+dp_rx_sg_create(qdf_nbuf_t nbuf,
+		uint8_t *rx_tlv_hdr,
+		uint16_t *mpdu_len,
+		bool *is_first_frag,
+		uint16_t *frag_list_len,
+		qdf_nbuf_t *head_frag_nbuf,
+		qdf_nbuf_t *frag_list_head,
+		qdf_nbuf_t *frag_list_tail);
+
 QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc,
 				uint32_t pool_id,
 				uint32_t pool_size,