drivers/rtc/rtc-tegra.c: protect suspend/resume callbacks with CONFIG_PM_SLEEP

CONFIG_PM doesn't actually enable any of the PM callbacks, it only allows
to enable CONFIG_PM_SLEEP and CONFIG_PM_RUNTIME.  This means if CONFIG_PM
is used to protect system sleep callbacks then it may end up unreferenced
if only runtime PM is enabled.  Hence protecting sleep callbacks with
CONFIG_PM_SLEEP.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-tegra.c

@@ -390,7 +390,7 @@ static int __exit tegra_rtc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int tegra_rtc_suspend(struct platform_device *pdev, pm_message_t state)
 {
 	struct device *dev = &pdev->dev;
@@ -446,7 +446,7 @@ static struct platform_driver tegra_rtc_driver = {
 		.owner	= THIS_MODULE,
 		.of_match_table = tegra_rtc_dt_match,
 	},
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 	.suspend	= tegra_rtc_suspend,
 	.resume		= tegra_rtc_resume,
 #endif