Adding new flash method: CMSIS-DAP with Coflash
Adding new flash method: CMSIS-DAP with Coflash

Tested with reflashed ST Link on Nucleo_F401 -> x893/CMSIS-DAP

ATM-HSW/mbed_target,ATM-HSW/mbed_target,ATM-HSW/mbed_target,ATM-HSW/mbed_target,ATM-HSW/mbed_target,ATM-HSW/mbed_target