wifi: iwlwifi: mvm: check for iwl_mvm_mld_update_sta() errors

The return value of this function is assigned, but then unused.
Check for errors here.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230921110727.a9496c232d48.I74adaa8f3c6fd3252348e79f18605246936ef27d@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

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

@@ -697,6 +697,8 @@ int iwl_mvm_mld_add_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 
 	/* at this stage sta link pointers are already allocated */
 	ret = iwl_mvm_mld_update_sta(mvm, vif, sta);
+	if (ret)
+		goto err;
 
 	for_each_sta_active_link(vif, sta, link_sta, link_id) {
 		struct ieee80211_bss_conf *link_conf =