scripts: zephyr_flash_debug: flash like pyocd.sh
scripts: zephyr_flash_debug: flash like pyocd.sh

Add support for flashing targets compatible with pyocd.sh.

Tested on 96b_nitrogen, nrf52_blenano2, and frdm_k64f, with and
without PYOCD_BOARD_ID. Additionally, frdm_k64f was tested with
PYOCD_DAPARG_ARG='limit_packets=True'.

Signed-off-by: Marti Bolivar <9d90ac4c7bf6a305f6bfd81a23c7859bc883380e@linaro.org>

ldts/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,fbsder/zephyr,aceofall/zephyr-iotos,GiulianoFranchetto/zephyr,kraj/zephyr,explora26/zephyr,kraj/zephyr,aceofall/zephyr-iotos,mbolivar/zephyr,zephyriot/zephyr,fbsder/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,explora26/zephyr,Vudentz/zephyr,zephyriot/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,zephyriot/zephyr,GiulianoFranchetto/zephyr,nashif/zephyr,punitvara/zephyr,explora26/zephyr,fbsder/zephyr,Vudentz/zephyr,aceofall/zephyr-iotos,mbolivar/zephyr,finikorg/zephyr,zephyriot/zephyr,Vudentz/zephyr,Vudentz/zephyr,fbsder/zephyr,ldts/zephyr,finikorg/zephyr,ldts/zephyr,galak/zephyr,zephyriot/zephyr,Vudentz/zephyr,galak/zephyr,finikorg/zephyr,punitvara/zephyr,ldts/zephyr,zephyrproject-rtos/zephyr,mbolivar/zephyr,finikorg/zephyr,nashif/zephyr,aceofall/zephyr-iotos,nashif/zephyr,punitvara/zephyr,mbolivar/zephyr,kraj/zephyr,finikorg/zephyr,punitvara/zephyr,kraj/zephyr,explora26/zephyr,galak/zephyr,nashif/zephyr,galak/zephyr,aceofall/zephyr-iotos,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,mbolivar/zephyr,Vudentz/zephyr,galak/zephyr,fbsder/zephyr,kraj/zephyr