wifi: iwlwifi: mvm: Don't access vif valid links directly

And instead use the vif getter functions, as a preparation for
supporting disabled/dormant links.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230615094410.61ca688cbbf1.Ic1b4049cf156238ff16e6c57959004da911cb5c8@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c

@@ -893,7 +893,7 @@ u8 iwl_mvm_mac_ctxt_get_lowest_rate(struct iwl_mvm *mvm,
 	u8 rate;
 	u32 i;
 
-	if (link_id == IEEE80211_LINK_UNSPECIFIED && vif->valid_links) {
+	if (link_id == IEEE80211_LINK_UNSPECIFIED && ieee80211_vif_is_mld(vif)) {
 		for (i = 0; i < ARRAY_SIZE(mvmvif->link); i++) {
 			if (!mvmvif->link[i])
 				continue;

drivers/net/wireless/intel/iwlwifi/mvm/mld-key.c

@@ -42,7 +42,7 @@ static u32 iwl_mvm_get_sec_sta_mask(struct iwl_mvm *mvm,
 	 * Of course the same can be done during add as well, but we must do
 	 * it during remove, since we don't have the mvmvif->ap_sta pointer.
 	 */
-	if (!sta && (keyconf->link_id >= 0 || !vif->valid_links))
+	if (!sta && (keyconf->link_id >= 0 || !ieee80211_vif_is_mld(vif)))
 		return BIT(link_info->ap_sta_id);
 
 	/* STA should be non-NULL now, but iwl_mvm_sta_fw_id_mask() checks */

drivers/net/wireless/intel/iwlwifi/mvm/mld-mac.c

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
- * Copyright (C) 2022 Intel Corporation
+ * Copyright (C) 2022 - 2023 Intel Corporation
  */
 #include "mvm.h"
 
@@ -50,7 +50,7 @@ static void iwl_mvm_mld_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 	 * the association response successfully, so just skip all that
 	 * and enable both when we have MLO.
 	 */
-	if (vif->valid_links) {
+	if (ieee80211_vif_is_mld(vif)) {
 		iwl_mvm_mld_set_he_support(mvm, vif, cmd);
 		cmd->eht_support = cpu_to_le32(1);
 		return;