configs: Add missing `_pre_instantiate` call in "run_lupv.py"

As of this change:
https://gem5-review.googlesource.com/c/public/gem5/+/65051, the
`_pre_instantiate` function must be called prior to `m5.instantiate`
when using the stdlib without the Simulator module.

Change-Id: Id5cec3b643d556b0f742719596abb53533b84cbd
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65871
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65976
1 file changed