fvp_utils: update script to run CSS models in open CI environment

Updated script to run the CSS models in the open CI environment

Change-Id: Ic1697304cd616e6f175bcbd9ca967a6314597b35
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
(cherry picked from commit f65f9a3420c3b3fda92cd6cdf5ebac720bd3aa26)
2 files changed