ecflash has no verification for the EC it detects. It will attempt to
read and erase whatever it finds, where it will hang. Document what it
*should* read and an example of what it *shouldn't* read.
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Internal flashing can result in corrupted or lost OS data. Make this
more explicit for internal flashing, and make it a point for external
flashing.
Signed-off-by: Tim Crawford <tcrawford@system76.com>
