In the selftests, we don't want to force an oom and would rather
ENOMEM be reported. In this case, we would rather the allocation for the
random array to fail.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171223110407.21402-2-chris@chris-wilson.co.uk