gpu-compute: Fatal on dynamic scratch allocation in GPUFS

This is known not working in GPUFS. As a result, the simulation will
never end. Rather than simulate forever, add a fatal for now to exit
simulation until support for this functionality is added.

Change-Id: I8e45996a7eb781575e8643baea05daf87bc5f1c3
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/58472
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed