configs: Set CPU vendor to M5 Simulator in apu_se.py

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>
1 file changed