gpio: ml-ioh: Use modern PM macros

Use the modern PM macros for the suspend and resume functions to be
automatically dropped by the compiler when CONFIG_PM or
CONFIG_PM_SLEEP are disabled, without having to use __maybe_unused

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Acked-by: Andy Shevchenko <andy@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Link: https://lore.kernel.org/r/20251124002105.25429-6-jszhang@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: xhackerustc

drivers/gpio/gpio-ml-ioh.c

@@ -160,7 +160,7 @@ static int ioh_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
 /*
  * Save register configuration and disable interrupts.
  */
-static void __maybe_unused ioh_gpio_save_reg_conf(struct ioh_gpio *chip)
+static void ioh_gpio_save_reg_conf(struct ioh_gpio *chip)
 {
 	int i;
 
@@ -186,7 +186,7 @@ static void __maybe_unused ioh_gpio_save_reg_conf(struct ioh_gpio *chip)
 /*
  * This function restores the register configuration of the GPIO device.
  */
-static void __maybe_unused ioh_gpio_restore_reg_conf(struct ioh_gpio *chip)
+static void ioh_gpio_restore_reg_conf(struct ioh_gpio *chip)
 {
 	int i;
 
@@ -479,7 +479,7 @@ static int ioh_gpio_probe(struct pci_dev *pdev,
 	return 0;
 }
 
-static int __maybe_unused ioh_gpio_suspend(struct device *dev)
+static int ioh_gpio_suspend(struct device *dev)
 {
 	struct ioh_gpio *chip = dev_get_drvdata(dev);
 	unsigned long flags;
@@ -491,7 +491,7 @@ static int __maybe_unused ioh_gpio_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused ioh_gpio_resume(struct device *dev)
+static int ioh_gpio_resume(struct device *dev)
 {
 	struct ioh_gpio *chip = dev_get_drvdata(dev);
 	unsigned long flags;
@@ -505,7 +505,7 @@ static int __maybe_unused ioh_gpio_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(ioh_gpio_pm_ops, ioh_gpio_suspend, ioh_gpio_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(ioh_gpio_pm_ops, ioh_gpio_suspend, ioh_gpio_resume);
 
 static const struct pci_device_id ioh_gpio_pcidev_id[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x802E) },
@@ -518,7 +518,7 @@ static struct pci_driver ioh_gpio_driver = {
 	.id_table = ioh_gpio_pcidev_id,
 	.probe = ioh_gpio_probe,
 	.driver = {
-		.pm = &ioh_gpio_pm_ops,
+		.pm = pm_sleep_ptr(&ioh_gpio_pm_ops),
 	},
 };