drm/amdgpu: Fix one list corruption when create queue fails

Queue would be freed when create_queue_cpsch fails
So lets do queue cleanup otherwise various list and memory issues
happen.

Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>