drm/amdgpu/gfx9: implement wave VGPR reading

This is already hooked up to the "amdgpu_gpr" debugfs file used by
the umr userspace debugging tool.

Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 file changed