fixed spilling operation type for some ColdFire instructions

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27064 3ad0048d-3df7-0310-abae-a5850022a9f2
include exec on Amiga only in the implementation part

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27065 3ad0048d-3df7-0310-abae-a5850022a9f2