qcacld-3.0: tx rate update for data packet in legacy modes

Currently, For legacy modes monitor mode reporting incorrect tx rate
for data packet in radiotap header due to packetcapture_hdr rate
is hardcoded as '0'.
This change calculates the data rate of legacy packets using mcs
reported in tx completion.

Change-Id: I2a651b8fb36947672bd30f8a635f0e643219e520
CRs-Fixed: 3442376

components/pkt_capture/core/src/wlan_pkt_capture_main.c

@@ -292,8 +292,8 @@ pkt_capture_process_tx_data(void *soc, void *log_data, u_int16_t vdev_id,
 	/* nss not available */
 	pktcapture_hdr.nss = 0;
 	pktcapture_hdr.rssi_comb = tx_comp_status.ack_frame_rssi;
-	/* rate not available */
-	pktcapture_hdr.rate = 0;
+	/* update rate from available mcs */
+	pktcapture_hdr.rate = tx_comp_status.mcs;
 	pktcapture_hdr.stbc = tx_comp_status.stbc;
 	pktcapture_hdr.sgi = tx_comp_status.sgi;
 	pktcapture_hdr.ldpc = tx_comp_status.ldpc;