igt/gem_busy: Remove repeated use of igt_spin_batch_new

igt_spin_batch_new() includes a throttling check that GEM works, which
breaks trying to create multiple spin batches, use
__igt_spin_batch_new() instead, after verifying GEM works.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
1 file changed