Input: imx6ul_tsc - 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 __maybe_unused markings.

Signed-off-by: Jonathan Cameron <[e-mail]>
Cc: Haibo Chen <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/touchscreen/imx6ul_tsc.c

···
 	return 0;
 }
 
-static int __maybe_unused imx6ul_tsc_suspend(struct device *dev)
+static int imx6ul_tsc_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct imx6ul_tsc *tsc = platform_get_drvdata(pdev);
···
 	return 0;
 }
 
-static int __maybe_unused imx6ul_tsc_resume(struct device *dev)
+static int imx6ul_tsc_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct imx6ul_tsc *tsc = platform_get_drvdata(pdev);
···
 	return retval;
 }
 
-static SIMPLE_DEV_PM_OPS(imx6ul_tsc_pm_ops,
-			 imx6ul_tsc_suspend, imx6ul_tsc_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(imx6ul_tsc_pm_ops,
+				imx6ul_tsc_suspend, imx6ul_tsc_resume);
 
 static const struct of_device_id imx6ul_tsc_match[] = {
 	{ .compatible = "fsl,imx6ul-tsc", },
···
 	.driver		= {
 		.name	= "imx6ul-tsc",
 		.of_match_table	= imx6ul_tsc_match,
-		.pm	= &imx6ul_tsc_pm_ops,
+		.pm	= pm_sleep_ptr(&imx6ul_tsc_pm_ops),
 	},
 	.probe		= imx6ul_tsc_probe,
 };