drm/amdgpu: Drop dead define in amdgpu.h

the struct was not in use any more.

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 file changed