wifi: iwlwifi: Correctly indicate support for VHT TX STBC

If HT STBC is not supported, do not indicate support for VHT TX
STBC.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230614123446.b24b5fba6fab.I116617875eb4a9d520df23a8c49a6594f9d8b2c6@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
- * Copyright (C) 2005-2014, 2018-2022 Intel Corporation
+ * Copyright (C) 2005-2014, 2018-2023 Intel Corporation
  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
  * Copyright (C) 2016-2017 Intel Deutschland GmbH
  */
@@ -516,7 +516,7 @@ static void iwl_init_vht_hw_capab(struct iwl_trans *trans,
 		num_tx_ants = 1;
 	}
 
-	if (num_tx_ants > 1)
+	if (trans->cfg->ht_params->stbc && num_tx_ants > 1)
 		vht_cap->cap |= IEEE80211_VHT_CAP_TXSTBC;
 	else
 		vht_cap->cap |= IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;