wifi: cfg80211: Improve the documentation for NL80211_CMD_ASSOC_MLO_RECONF

The existing documentation for the NL80211_CMD_ASSOC_MLO_RECONF
does not clearly explain handling of link reconfiguration request
results from the driver.

Add documentation to explain that the command is used as an event to
notify userspace about added links information, and that the existing
NL80211_CMD_LINKS_REMOVED command is used to notify userspace about
removed links information.

Signed-off-by: Kavita Kavita <quic_kkavita@quicinc.com>
Link: https://patch.msgid.link/20250604105757.2542-2-quic_kkavita@quicinc.com


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