firmware: Updating FSP scripts after a few findings with the new FSP uprev.

The script wasn't staging the changes which was needed due to the
committer being different from the uploader.

The script didn't set "--no-ff", which broke for a clean fast-forward
merge

BUG=none
TEST=Performed tigerlake FSP uprev for TGL.3163.01

Change-Id: I473b5840e92e04a18903e3e25fae6ec4bb5d02bb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2173800
Tested-by: Dossym Nurmukhanov <dossym@chromium.org>
Reviewed-by: Nick Vaccaro <nvaccaro@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Auto-Submit: Dossym Nurmukhanov <dossym@chromium.org>
1 file changed