watchdog: omap: Remove #ifdef guards for PM related functions

Use the pm_ptr() macro to handle the .suspend/.resume callbacks.

This macro allows the suspend and resume functions to be automatically
dropped by the compiler when CONFIG_SUSPEND is disabled, without having
to use #ifdef guards. Not using #ifdef guards means that the code is
always compiled independently of any Kconfig option, and thanks to that
bugs and regressions are easier to catch.

Signed-off-by: Paul Cercueil <[e-mail]>
Acked-by: Aaro Koskinen <[e-mail]>
Reviewed-by: Guenter Roeck <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Guenter Roeck <[e-mail]>
Signed-off-by: Wim Van Sebroeck <[e-mail]>

drivers/watchdog/omap_wdt.c

···
 	return 0;
 }
 
-#ifdef	CONFIG_PM
-
 /* REVISIT ... not clear this is the best way to handle system suspend; and
  * it's very inappropriate for selective device suspend (e.g. suspending this
  * through sysfs rather than by stopping the watchdog daemon).  Also, this
···
 	return 0;
 }
 
-#else
-#define	omap_wdt_suspend	NULL
-#define	omap_wdt_resume		NULL
-#endif
-
 static const struct of_device_id omap_wdt_of_match[] = {
 	{ .compatible = "ti,omap3-wdt", },
 	{},
···
 	.probe		= omap_wdt_probe,
 	.remove		= omap_wdt_remove,
 	.shutdown	= omap_wdt_shutdown,
-	.suspend	= omap_wdt_suspend,
-	.resume		= omap_wdt_resume,
+	.suspend	= pm_ptr(omap_wdt_suspend),
+	.resume		= pm_ptr(omap_wdt_resume),
 	.driver		= {
 		.name	= "omap_wdt",
 		.of_match_table = omap_wdt_of_match,