Platform: Added PyOCD support into scripts for LPCxpresso55s69

Added support for PyOCD flashing into the scripts for LPCxpresso5569 and
also updated README file.

Signed-off-by: MartinaHanusovaNXP <martina.hanusova@nxp.com>
Change-Id: Iccacfb78474a3b48e2c279e4a45e25a639370802
10 files changed