ASoC: cs35l56: Use pm_ptr()

Use pm_ptr() when setting the pointer to the dev_pm_ops so that it
will be NULL if CONFIG_PM is disabled. This allows the dev_pm_ops to be
compiled out in that case.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230914150918.14505-2-rf@opensource.cirrus.com


Signed-off-by: Mark Brown <broonie@kernel.org>