Input: tc3589x - switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr()

SIMPLE_DEV_PM_OPS() is deprecated as it requires explicit protection
against unused function warnings. The new combination of pm_sleep_ptr()
and DEFINE_SIMPLE_DEV_PM_OPS() allows the compiler to see the functions,
thus suppressing the warning, but still allowing the unused code to be
removed. Thus also drop the ifdef guards.

Signed-off-by: Jonathan Cameron <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/keyboard/tc3589x-keypad.c

···
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
 static int tc3589x_keypad_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
···
 
 	return 0;
 }
-#endif
 
-static SIMPLE_DEV_PM_OPS(tc3589x_keypad_dev_pm_ops,
-			 tc3589x_keypad_suspend, tc3589x_keypad_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(tc3589x_keypad_dev_pm_ops,
+				tc3589x_keypad_suspend, tc3589x_keypad_resume);
 
 static struct platform_driver tc3589x_keypad_driver = {
 	.driver	= {
 		.name	= "tc3589x-keypad",
-		.pm	= &tc3589x_keypad_dev_pm_ops,
+		.pm	= pm_sleep_ptr(&tc3589x_keypad_dev_pm_ops),
 	},
 	.probe	= tc3589x_keypad_probe,
 };