Add a --post-flash-cmd command line argument
Add a --post-flash-cmd command line argument

This allows a user to specify the u-boot command to run after flashing
is complete (e.g 'ums 0 mmc 0'), defaults to 'reset' if not set

Signed-off-by: James Thomas <565d893dc4492a23a3f872858fbf9ea30932e490@codethink.co.uk>
Signed-off-by: Stephen Warren <5ef2a23ba3aff51d1cfc8c113c1ec34b608b3b13@nvidia.com>

NVIDIA/tegra-uboot-flasher-scripts