m68k: Add support for MMU instructions

[huth]

Seems like Capstone is not able to disassemble the MMU instructions like the PMOVE of the 68030 yet. With another disassembler, I get the correct result:

$00e0006a : f039 4000 00e4 9430        pmove     $e49430,tc
$00e00072 : f039 0800 00e4 9430        pmove     $e49430,tt0
$00e0007a : f039 0c00 00e4 9430        pmove     $e49430,tt1

But Capstone misinterprets them as FPU instructions:

$00e0006a : f039 4000 00e4 9430        fmove.l   $e49430.l,fp0
$00e00072 : f039 0800                  fmove     fp2,fp0
$00e00076 : 00e4                       dc.w      $00e4                     ; unknown opcode
$00e00078 : 9430 f039                  sub.b     $39(a0,a7.w),d2

Additionally, the MMU instructions of the 68040 (which are completely different from the 68030) also do not seem to work yet, e.g. a PFLUSHA does not get disassembled right:

$ cstool m68k40 0xf518
 0  f5 18  dc.w	$f518