hwrng: exynos - switch to DEFINE_SIMPLE_DEV_PM_OPS

SIMPLE_DEV_PM_OPS is deprecated, replace it with DEFINE_SIMPLE_DEV_PM_OPS
and use pm_sleep_ptr for setting the driver's pm routines. We can now
remove the __maybe_unused qualifier in the suspend and resume functions.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/exynos-trng.c

@@ -185,14 +185,14 @@ static int exynos_trng_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static int __maybe_unused exynos_trng_suspend(struct device *dev)
+static int exynos_trng_suspend(struct device *dev)
 {
 	pm_runtime_put_sync(dev);
 
 	return 0;
 }
 
-static int __maybe_unused exynos_trng_resume(struct device *dev)
+static int exynos_trng_resume(struct device *dev)
 {
 	int ret;
 
@@ -205,7 +205,7 @@ static int __maybe_unused exynos_trng_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(exynos_trng_pm_ops, exynos_trng_suspend,
+static DEFINE_SIMPLE_DEV_PM_OPS(exynos_trng_pm_ops, exynos_trng_suspend,
 			 exynos_trng_resume);
 
 static const struct of_device_id exynos_trng_dt_match[] = {
@@ -219,7 +219,7 @@ MODULE_DEVICE_TABLE(of, exynos_trng_dt_match);
 static struct platform_driver exynos_trng_driver = {
 	.driver = {
 		.name = "exynos-trng",
-		.pm = &exynos_trng_pm_ops,
+		.pm = pm_sleep_ptr(&exynos_trng_pm_ops),
 		.of_match_table = exynos_trng_dt_match,
 	},
 	.probe = exynos_trng_probe,