+ m68k, do_spill_replace: support more cases.
+ support spilling at offsets >32767, tested only to generate assemble-able code, support of large stack frames needs more changes elsewhere.


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28295 3ad0048d-3df7-0310-abae-a5850022a9f2