wifi: mac80211: fix multi-link element inheritance

wifi: mac80211: fix multi-link element inheritance

When parsing a beacon, mac80211 erroneously inherits any
reconfiguration or EPCS multi-link elements from the outer
elements into the multi-BSSID profile that's requested, if
connected to a non-transmitted BSS, unless that profile
has a non-inheritance element.

This also happens if parsing a multi-BSSID profile that
doesn't have a non-inheritance element.

Fix this by having an empty non-inheritance element so
cfg80211_is_element_inherited() is invoked in these cases
and causes the parser to skip the elements that should
never be inherited.

Fixes: cf36cdef10e2 ("wifi: mac80211: Add support for parsing Reconfiguration Multi Link element")
Fixes: 24711d60f849 ("wifi: mac80211: Support parsing EPCS ML element")
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://patch.msgid.link/20260508091032.92184c0a3f08.I3c43b0b63d2cef8a4ddddaef1c2faaeb1de711ad@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>