dev: Introduced new LupV Platform

This is a platform with a RISC-V processor and the LupIO devices that
will allow users to decide which programmable interrupt controller to
use in their system. It currently uses the PLIC device.

Change-Id: Ife6cf5c14845be725e66178693e9ba0ee5fda511
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/53027
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
4 files changed