ASoC: pcm512x: Convert to EXPORT_GPL_DEV_PM_OPS()

ASoC: pcm512x: Convert to EXPORT_GPL_DEV_PM_OPS()

Use the newer EXPORT_GPL_DEV_PM_OPS() macro together with pm_ptr(),
which allows us to drop superfluous CONFIG_PM ifdefs.

This optimizes slightly when CONFIG_PM is disabled, too.

Cc: Shenghao Ding <shenghao-ding@ti.com>
Cc: Kevin Lu <kevin-lu@ti.com>
Cc: Baojun Xu <baojun.xu@ti.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20250317095603.20073-29-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>