wifi: iwlwifi: mvm: avoid link lookup in statistics

We already iterate the link bss_conf/link_info and have the
pointer, or know that deflink/bss_conf is used, so avoid an
extra lookup and just pass the pointer. This may also avoid
a crash when this is processed during restart, where the FW
to link conf array (link_id_to_link_conf) may be NULLed out.

Fixes: c1e458b9

 ("wifi: iwlwifi: mvm: Move beacon filtering to be per link")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20240703064026.346a6ef67a86.Iba5d65d728ca9f58518c88d029496c1250670544@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>