qcacmn: Add support for last tx rate for multicast

Apstats display last tx rate for unicast as well as for multicast
hence we are adding support for last tx rate for multicast

Change-Id: I94cdcbb9c156ecaa4b7a5407a0f0c00dfa9786e9

dp/inc/cdp_txrx_stats_struct.h

@@ -110,8 +110,10 @@ struct cdp_pkt_type {
  * @non_amsdu_cnt: Number of MSDUs with no MSDU level aggregation
  * @amsdu_cnt: Number of MSDUs part of AMSDU
  * @tx_rate: Tx Rate
- * @last_tx_rate: Last tx rate
- * @last_tx_rate_mcs: Tx rate mcs
+ * @last_tx_rate: Last tx rate for unicast packets
+ * @last_tx_rate_mcs: Tx rate mcs for unicast packets
+ * @mcast_last_tx_rate: Last tx rate for multicast packets
+ * @mcast_last_tx_rate_mcs: Last tx rate mcs for multicast
  * @last_per: Tx Per
  * @rnd_avg_tx_rate: Rounded average tx rate
  * @avg_tx_rate: Average TX rate
@@ -177,6 +179,8 @@ struct cdp_tx_stats {
 	uint32_t tx_rate;
 	uint32_t last_tx_rate;
 	uint32_t last_tx_rate_mcs;
+	uint32_t mcast_last_tx_rate;
+	uint32_t mcast_last_tx_rate_mcs;
 	uint32_t last_per;
 	uint32_t rnd_avg_tx_rate;
 	uint32_t avg_tx_rate;