don't swap the base and index registers if we have a scalefactor

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27109 3ad0048d-3df7-0310-abae-a5850022a9f2
n68kmem node for better utilization of 68k specialities in addressing

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27110 3ad0048d-3df7-0310-abae-a5850022a9f2