wifi: mac80211: rework RX packet handling

The code has grown over time and it was not correctly handling all
cases. Examples of issues are that for management frames we would match
the received address against the MLD address even though we should not
resolve the station in that case. Another issue was that for data frames
we would not correctly fall back to use link addresses when the driver
does not provide the pubsta already.

The new code still uses the same approach as before. For data frames,
assume that a valid station exists and interfaces do not need to be
iterated. On the other hand, for non-data frames (or if a data frame
without a station is received) all interfaces must be iterated.

Note that this rework makes mac80211 slightly more strict. For example,
previously mac80211 would have incorrectly accepted a data frame that
was transmitted on the wrong link.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://patch.msgid.link/20260915151925.de2fc9a47273.Ie12ec077142c6a7fdbb58cdfc5660497cc75150e@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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