drm/amdgpu: Enable RAS error injection after mode2 reset on Aldebaran

Add the missing call to re-enable RAS error injections on the Aldebaran
mode2 reset code path.

Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>