mfd: intel_soc_pmic_chtdc_ti: Switch from __maybe_unused to pm_sleep_ptr() etc

Letting the compiler remove these functions when the kernel is built
without CONFIG_PM_SLEEP support is simpler and less heavier for builds
than the use of __maybe_unused attributes.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20220906134256.14293-1-andriy.shevchenko@linux.intel.comSigned-off-by: Lee Jones <lee@kernel.org>

drivers/mfd/intel_soc_pmic_chtdc_ti.c

@@ -140,7 +140,7 @@ static void chtdc_ti_shutdown(struct i2c_client *i2c)
 	disable_irq(pmic->irq);
 }
 
-static int __maybe_unused chtdc_ti_suspend(struct device *dev)
+static int chtdc_ti_suspend(struct device *dev)
 {
 	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 
@@ -149,7 +149,7 @@ static int __maybe_unused chtdc_ti_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused chtdc_ti_resume(struct device *dev)
+static int chtdc_ti_resume(struct device *dev)
 {
 	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 
@@ -158,7 +158,7 @@ static int __maybe_unused chtdc_ti_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(chtdc_ti_pm_ops, chtdc_ti_suspend, chtdc_ti_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(chtdc_ti_pm_ops, chtdc_ti_suspend, chtdc_ti_resume);
 
 static const struct acpi_device_id chtdc_ti_acpi_ids[] = {
 	{ "INT33F5" },
@@ -169,7 +169,7 @@ MODULE_DEVICE_TABLE(acpi, chtdc_ti_acpi_ids);
 static struct i2c_driver chtdc_ti_i2c_driver = {
 	.driver = {
 		.name = "intel_soc_pmic_chtdc_ti",
-		.pm = &chtdc_ti_pm_ops,
+		.pm = pm_sleep_ptr(&chtdc_ti_pm_ops),
 		.acpi_match_table = chtdc_ti_acpi_ids,
 	},
 	.probe_new = chtdc_ti_probe,