Revert "drm/amdgpu: No longer insert ras blocks into ras_list if it already exists...

Revert "drm/amdgpu: No longer insert ras blocks into ras_list if it already exists in ras_list"

This reverts commit 9526834052f660b0a85a2968b7c890f3c544f1b7.

Xgmi ras initialization had been moved from .late_init to early_init,
the defect of repeated calling amdgpu_ras_register_ras_block had been
fixed, so revert this patch.

Signed-off-by: yipechai <YiPeng.Chai@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>