m68k/ra68k.pas: fixed some multi level comment warnings, so it now compiles with warnings on

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27734 3ad0048d-3df7-0310-abae-a5850022a9f2
m68k/ra68kmot.pas: fixed a pointer to signed int cast warning, so it now compiles with warnings on

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27735 3ad0048d-3df7-0310-abae-a5850022a9f2