Input: lpc32xx-keys - 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 <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20221204180841.2211588-15-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/lpc32xx-keys.c

@@ -264,7 +264,6 @@ static int lpc32xx_kscan_probe(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
 static int lpc32xx_kscan_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
@@ -302,9 +301,8 @@ static int lpc32xx_kscan_resume(struct device *dev)
 	mutex_unlock(&input->mutex);
 	return retval;
 }
-#endif
 
-static SIMPLE_DEV_PM_OPS(lpc32xx_kscan_pm_ops, lpc32xx_kscan_suspend,
+static DEFINE_SIMPLE_DEV_PM_OPS(lpc32xx_kscan_pm_ops, lpc32xx_kscan_suspend,
 				lpc32xx_kscan_resume);
 
 static const struct of_device_id lpc32xx_kscan_match[] = {
@@ -317,7 +315,7 @@ static struct platform_driver lpc32xx_kscan_driver = {
 	.probe		= lpc32xx_kscan_probe,
 	.driver		= {
 		.name	= DRV_NAME,
-		.pm	= &lpc32xx_kscan_pm_ops,
+		.pm	= pm_sleep_ptr(&lpc32xx_kscan_pm_ops),
 		.of_match_table = lpc32xx_kscan_match,
 	}
 };