Minor updates to the Thumb2 disassembly:

 - Bugfixes:
    * Distinguish branch from misc via "!=" not "=="
    * MRS register shift is 8 bits (vs MSR being 16)
 - Format tweaks:
    * CPS needed tab (not space)
    * add commma before some shifts
    * add space after comma in LDM/STM
    * use ".W" width spec on various instructions

git-svn-id: svn://svn.berlios.de/openocd/trunk@2553 b42882b7-edfa-0310-969c-e2dbd0fdcd60