wifi: iwlwifi: mld: decode EOF bit for AMPDUs

Only the EOF bit handling for single frames was ported to the MLD
driver. The code to handle AMPDUs correctly was forgotten. Add it back
so that the bit is reported in the radiotap headers again.

Fixes: d1e879ec ("wifi: iwlwifi: add iwlmld sub-driver")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Reviewed-by: Daniel Gabay <daniel.gabay@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250723094230.195be86372d5.I4db4abf348f7b6dfc75f869770dd77655a204bc7@changeid