Equips the fs.py config routine with an extra commandline option --generate-dtb that will generate a dtb file automatically before running the simulation. Only works with ARM systems and gives a warning if the simulated system is not of --machine-type VExpress_GEM5_V1. Change-Id: I7766e5459fd9bec2245de83cef103091ebaf7229 Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5968 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>