iwlwifi: drop iwl3945_tid_data

This patch is one of the incremental steps for unifying iwl_station_entry
for all HWs, i.e. removing of iwl3945_station_entry
This patch drops iwl3945_tid_data and use iwl_tid_data instead.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>