Since both sg and device type BOs have metadata buffer, free
the buffer in both cases when to destroy BOs
Signed-off-by: Shiwu Zhang <shiwu.zhang@amd.com> Acked-by: Nirmoy Das <Nirmoy.das@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>