PIDL (DCERPC lsa): enhance dissector

* Fix -Wunused-function (Add functions to lsa.cnf with NOEMIT)
* Remove also some MANUAL function (no unused too..)
* Remove dissector DCERPC lsa from DIRTY list

Change-Id: I7b7f924f244757207f378b8650b8dd30e739da08
Reviewed-on: https://code.wireshark.org/review/4325
Reviewed-by: Michael Mann <mmann78@netscape.net>