ASoC: wm_adsp: Use no_core_startstop to prevent creating preload control

The no_core_startstop flag indicates a self-booting DSP - they are
considered to be always running and therefore cannot be pre-loaded.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230320112245.115720-3-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>