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 #ifdef guards.

This has the advantage of always compiling these functions in,
independently of any Kconfig option. Thanks to that, bugs and other
regressions are subsequently easier to catch.

At the same time, replace the platform_driver's .suspend and .resume
usage with modern device_driver's .pm usage.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
 drivers/mmc/host/au1xmmc.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c
index 85470773650d..cc6e05f9b96f 100644
--- a/drivers/mmc/host/au1xmmc.c
+++ b/drivers/mmc/host/au1xmmc.c
@@ -1150,10 +1150,9 @@ static void au1xmmc_remove(struct platform_device *pdev)
 	}
 }
 
-#ifdef CONFIG_PM
-static int au1xmmc_suspend(struct platform_device *pdev, pm_message_t state)
+static int au1xmmc_suspend(struct device *dev)
 {
-	struct au1xmmc_host *host = platform_get_drvdata(pdev);
+	struct au1xmmc_host *host = dev_get_drvdata(dev);
 
 	__raw_writel(0, HOST_CONFIG2(host));
 	__raw_writel(0, HOST_CONFIG(host));
@@ -1164,27 +1163,24 @@ static int au1xmmc_suspend(struct platform_device *pdev, pm_message_t state)
 	return 0;
 }
 
-static int au1xmmc_resume(struct platform_device *pdev)
+static int au1xmmc_resume(struct device *dev)
 {
-	struct au1xmmc_host *host = platform_get_drvdata(pdev);
+	struct au1xmmc_host *host = dev_get_drvdata(dev);
 
 	au1xmmc_reset_controller(host);
 
 	return 0;
 }
-#else
-#define au1xmmc_suspend NULL
-#define au1xmmc_resume NULL
-#endif
+
+static DEFINE_SIMPLE_DEV_PM_OPS(au1xmmc_pmops, au1xmmc_suspend, au1xmmc_resume);
 
 static struct platform_driver au1xmmc_driver = {
 	.probe         = au1xmmc_probe,
 	.remove        = au1xmmc_remove,
-	.suspend       = au1xmmc_suspend,
-	.resume        = au1xmmc_resume,
 	.driver        = {
 		.name  = DRIVER_NAME,
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+		.pm = pm_sleep_ptr(&au1xmmc_pmops),
 	},
 };
 
-- 
2.50.0