wifi: iwlwifi: mvm: avoid sending MAC context for idle

If we change only idle, avoid sending the MAC context
command since it doesn't depend on idle state. This
also fixes an issue with the firmware because without
this we send the command during link switching, as we
just deactivated the first link, and we cannot send
this command when there's no active link.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230329100039.f5218f8453ec.I1325ff14ec07a27dd7ea2c1c210a1721d969839f@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c

@@ -563,6 +563,12 @@ static void iwl_mvm_mld_vif_cfg_changed_station(struct iwl_mvm *mvm,
 	unsigned int i;
 	int ret;
 
+	/* This might get called without active links during the
+	 * chanctx switch, but we don't care about it anyway.
+	 */
+	if (changes == BSS_CHANGED_IDLE)
+		return;
+
 	ret = iwl_mvm_mld_mac_ctxt_changed(mvm, vif, false);
 	if (ret)
 		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);