igt/pm_rps: Always allocate spin[0]

Avoid having to test for spin[0] existing by starting the load-loop with
it allocated.

v2: Preallocate the spin[1] as well for high load.

References: https://bugs.freedesktop.org/show_bug.cgi?id=104060
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104318
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
1 file changed