dev-amdgpu: Add device memory

This adds the actual backing store for the GPU framebuffer.

Change-Id: I22c6dd9bd25b216c4ec99ee472c83d4cb2648efb
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/57533
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2 files changed