- cleaned up str7, str9 and stm32 flash drivers

- str7 flash driver now checks correct busy bits depending on device
- str9 flash driver now disables ITCM order as per st programming manual
- added str7 disable_jtag command
- added gdb_detach command
- updated arm966e cp15 support
- fix crash on mingw build when enabling target_request debugmsgs

git-svn-id: svn://svn.berlios.de/openocd/trunk@209 b42882b7-edfa-0310-969c-e2dbd0fdcd60