* more fixes to the 3-op IMUL spilling:
  o Return the correct operation type for all forms of IMUL in
    taicpu.spilling_get_operation_type
  o Properly support 3-op IMUL in trgx86.do_spill_replace



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26514 3ad0048d-3df7-0310-abae-a5850022a9f2