drm/amdgpu: drop bo_list_clone when no scheduler
drm/amdgpu: drop bo_list_clone when no scheduler

bo_list_clone() will take a lot of time when bo_list hold too much
elements, like above 7000

Signed-off-by: Monk.Liu <f0dcd2918cf36bae5755fd56cd0eda1b82813c07@amd.com>
Reviewed-by: Chunming Zhou <331ec51bea57dab96050040a347da39906b1207b@amd.com>
Reviewed-by: Jammy Zhou <14aa832fda862cf32a0e072c86c92f414da11bc2@amd.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs