Tools: Add synchronization of private coreboot repo from Intel

For early development, Intel/Google collaborates using a private fork
of coreboot. This script now allows one to synchronize to a tag or
main branch of the Intel tree.

BUG=b:164170372
TEST=Validated that synchronization of FSP didn't break and that the
sync of ADL tree is working (see chromium-internal:3216944)

Change-Id: I7f2547a42dd0b8f8b994c042f85e6413944c3f6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2357030
Tested-by: Dossym Nurmukhanov <dossym@chromium.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Commit-Queue: Dossym Nurmukhanov <dossym@chromium.org>
1 file changed