Input: max7359-keypad - 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/20221204180841.2211588-17-jic23@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: jic23

drivers/input/keyboard/max7359_keypad.c

@@ -242,7 +242,6 @@ static int max7359_probe(struct i2c_client *client)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
 static int max7359_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
@@ -267,9 +266,8 @@ static int max7359_resume(struct device *dev)
 
 	return 0;
 }
-#endif
 
-static SIMPLE_DEV_PM_OPS(max7359_pm, max7359_suspend, max7359_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(max7359_pm, max7359_suspend, max7359_resume);
 
 static const struct i2c_device_id max7359_ids[] = {
 	{ "max7359", 0 },
@@ -280,7 +278,7 @@ MODULE_DEVICE_TABLE(i2c, max7359_ids);
 static struct i2c_driver max7359_i2c_driver = {
 	.driver = {
 		.name = "max7359",
-		.pm   = &max7359_pm,
+		.pm   = pm_sleep_ptr(&max7359_pm),
 	},
 	.probe_new	= max7359_probe,
 	.id_table	= max7359_ids,