Removed unused CONFIG_DRM_AMDGPU_GART_DEBUGFS code.
We can use umr instead of this gart debugfs.
Signed-off-by: NNirmoy Das <nirmoy.das@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>