regulator: fan53555: Fix W=1 build warning when CONFIG_OF=n

Fix below warning when CONFIG_OF=n:

drivers/regulator/fan53555.c:439:34: warning: ‘fan53555_dt_ids’ defined but not used [-Wunused-const-variable=]
439 | static const struct of_device_id fan53555_dt_ids[] = {
| ^~~~~~~~~~~~~~~

Signed-off-by: Jisheng Zhang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/fan53555.c

···
 	return pdata;
 }
 
-static const struct of_device_id fan53555_dt_ids[] = {
+static const struct of_device_id __maybe_unused fan53555_dt_ids[] = {
 	{
 		.compatible = "fcs,fan53526",
 		.data = (void *)FAN53526_VENDOR_FAIRCHILD,