intel_sync_upstream: Add NVL support

This patch adds support for NVL FSP uprev in intel_sync_upstream script

BUG=b:498793303
TEST=CQ

Change-Id: I0726a036041b8905c5ec25e098bf73569310702d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/7805046
Commit-Queue: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Subrata Banik <subratabanik@chromium.org>
Tested-by: Karthik Ramasubramanian <kramasub@google.com>