util/unpack_ftb.py: a script to convert FTB file into bin file
util/unpack_ftb.py: a script to convert FTB file into bin file

ST firmwares are released in FTB format, which can't be written to flash
directly.  This python script can convert a file in FTB format into
bin file.  Currently, we only support FTB files of whiskers touchpad
firmware.

BRANCH=none
BUG=b:70482333
TEST=manual
Signed-off-by: Wei-Han Chen <5413a119f383c3f4549c3ef659403f393bf06e9d@chromium.org>

Change-Id: I179de12663580881347a31f11b5b10659e00b879
Reviewed-on: https://chromium-review.googlesource.com/918603
Commit-Ready: Wei-Han Chen <5413a119f383c3f4549c3ef659403f393bf06e9d@chromium.org>
Tested-by: Wei-Han Chen <5413a119f383c3f4549c3ef659403f393bf06e9d@chromium.org>
Reviewed-by: Nicolas Boichat <f3daba1cdc403799935674d3cd4b0e5bd1804232@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec