wifi: iwlwifi: mvm: don't do duplicate detection for nullfunc packets

wifi: iwlwifi: mvm: don't do duplicate detection for nullfunc packets

For non-QoS nullfunc packets we currently do the duplicate detection,
which seems a bit wrong. Fix the code to check for _any_ instead of
just _qos_ nullfunc.

Also remove setting the RX_FLAG_DUP_VALIDATED flag, we haven't done
anything here; in particular, we haven't checked for multicast in an
MLO scenario.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240205211151.4fea3bd2d4a6.Ib80764f4581d875cff08469016894f7c817c3828@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>