configs,dev-amdgpu: GPUFS MI200/gfx90a support

Add support for MI200-like device. This includes adding PCI IDs and new
MMIOs for the device, a different MAP_PROCESS packet, and a different
calculation for the number of VGPRs.

Change-Id: I0fb7b3ad928826beaa5386d52a94ba504369cb0d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/70317
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
14 files changed