Other vendor strings causes, for some reason, bad addresses to be computed when running the GPU model. This change reverts back to M5 Simulator only for apu_se.py. Change-Id: I5992b4e31569f5c0e5e49e523908c8fa0602f845 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65991 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Maintainer: Matt Sinclair <mattdsinclair@gmail.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>