Increase number of FE modules to six for a full station
Update top/firmware/hdl/emp_project_decl.vhd, top/firmware/hdl/link_maps.vhd, top/addr_table/emp_payload.xml
Update top/firmware/hdl/emp_project_decl.vhd, top/firmware/hdl/link_maps.vhd, top/addr_table/emp_payload.xml