Add car_stage_entry as an optional routine in the checklist.
TEST=Build and run on Galileo Gen2
Change-Id: I52f6aefc2566beac01373dbebf3a43d35032a0df
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/15129
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>