drm/amdgpu: start autoload till RLCG fw for navi12

rlc save restore list is not ready yet for navi12

Signed-off-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Reviewed-by: Jack Xiao <Jack.Xiao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>