ARM11 command handling fixes

 - Commands were supposed to have been "arm11 memwrite ..."
   not "memwrite ..."
 - Get rid of obfuscatory macros
 - Re-alphabetize
 - Add docs for "arm11 vcr"


git-svn-id: svn://svn.berlios.de/openocd/trunk@2776 b42882b7-edfa-0310-969c-e2dbd0fdcd60