UPSTREAM: 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.com


Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Bug: 344476904
Change-Id: Ifad891ee8c6ca369512763716287a2fbd624e1d3
(cherry picked from commit 9f6d4b8d)
Signed-off-by: Xin Deng <quic_deng@quicinc.com>