Methods to Reset Persistent Partition

To reset the partition there are two (2) different workflows:

1. Using bootburn.py to flash target: Please add -–init_persistent_partitions command-line argument to bootburn.

2. Using create_bsp_images.py + flash_bsp_images.py to flash target: Please add –init_persistent_partitions to create_bsp_images.py. (No --init_persistent_partitions command-line argument required for flash_bsp_images.)