gpio: xgene: 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: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Link: https://lore.kernel.org/r/20251124002105.25429-13-jszhang@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: xhackerustc

drivers/gpio/gpio-xgene.c

@@ -130,7 +130,7 @@ static int xgene_gpio_dir_out(struct gpio_chip *gc,
 	return 0;
 }
 
-static __maybe_unused int xgene_gpio_suspend(struct device *dev)
+static int xgene_gpio_suspend(struct device *dev)
 {
 	struct xgene_gpio *gpio = dev_get_drvdata(dev);
 	unsigned long bank_offset;
@@ -143,7 +143,7 @@ static __maybe_unused int xgene_gpio_suspend(struct device *dev)
 	return 0;
 }
 
-static __maybe_unused int xgene_gpio_resume(struct device *dev)
+static int xgene_gpio_resume(struct device *dev)
 {
 	struct xgene_gpio *gpio = dev_get_drvdata(dev);
 	unsigned long bank_offset;
@@ -156,7 +156,7 @@ static __maybe_unused int xgene_gpio_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(xgene_gpio_pm, xgene_gpio_suspend, xgene_gpio_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(xgene_gpio_pm, xgene_gpio_suspend, xgene_gpio_resume);
 
 static int xgene_gpio_probe(struct platform_device *pdev)
 {
@@ -204,7 +204,7 @@ static struct platform_driver xgene_gpio_driver = {
 		.name = "xgene-gpio",
 		.of_match_table = xgene_gpio_of_match,
 		.acpi_match_table = ACPI_PTR(xgene_gpio_acpi_match),
-		.pm     = &xgene_gpio_pm,
+		.pm     = pm_sleep_ptr(&xgene_gpio_pm),
 	},
 	.probe = xgene_gpio_probe,
 };