tests/kms_chv_cursor_fail: Run the tests with fewer steps.

This reduces the runtime of the tests from ~200s on my 30 fps 4k panel
to 10s.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
1 file changed