Make the Thumb2 disassembler handle a bunch of 32-bit instructions:

  A5.3.4 Branches and miscellaneous control
 
Note that this shifts some responsabililty out of helper functions,
making the code and layout simpler for 32-bit decoders:  they only
need to know how to format the instruction and its parameters.

Also, technical note:  with this patch, Thumb1 decoders could now
call the Thumb2 decoder if they wanted to get nicer treatment of
the exiting 32-bit B/BLX instructions.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2532 b42882b7-edfa-0310-969c-e2dbd0fdcd60