wifi: cfg80211: Clear mlo_links info when STA disconnects

wdev->valid_links is not cleared when upper layer disconnect from a
wdev->AP MLD. It has been observed that this would prevent offchannel
operations like remain-on-channel which would be needed for user space
operations with Public Action frame.
Clear the wdev->valid_links when STA disconnects.
Signed-off-by: Xin Deng <quic_deng@quicinc.com>
Link: https://msgid.link/20240426092501.8592-1-quic_deng@quicinc.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/sme.c

@@ -1353,6 +1353,7 @@ void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 		return;
 
 	cfg80211_wdev_release_bsses(wdev);
+	wdev->valid_links = 0;
 	wdev->connected = false;
 	wdev->u.client.ssid_len = 0;
 	wdev->conn_owner_nlportid = 0;