qcacmn: Send "tx_max_mcs_nss" for tlv command

Add tx_max_mcs_nss for TLV command.
It is used in computing nss and mcs for tx path.

Change-Id: Id5d4e5ff5318582586d3e29609a9feaa52516fe0

wmi/src/wmi_unified_tlv.c

@@ -2675,6 +2675,7 @@ static QDF_STATUS send_peer_assoc_cmd_tlv(wmi_unified_t wmi_handle,
 		mcs->rx_mcs_set = param->rx_mcs_set;
 		mcs->tx_max_rate = param->tx_max_rate;
 		mcs->tx_mcs_set = param->tx_mcs_set;
+		mcs->tx_max_mcs_nss = param->tx_max_mcs_nss;
 	}
 
 	/* HE Rates */