* huge m68k/cgcpu.pas cleanup and improvement commit

- removed the ancient DEBUG_CHARLIE silliness... :)
- moved some repeated code patterns into separate functions
- rewrote most of of tcg68k.a_op_const_reg and tcg68k.a_op_reg_reg
- smarter code generation in tcg68k.a_cmp_const_reg_label
- added support for MULU/MULS on Coldfire in a case which is often used by the CG to index arrays to be used instead of the RTL helpers, this results in a *HUGE* speedup in tw5086 for example


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25702 3ad0048d-3df7-0310-abae-a5850022a9f2