Input: cma3000 - use pm_sleep_ptr() to allow removal of ifdef CONFIG_PM guards

As the guards only apply to suspend and resume, #ifdef CONFIG_PM_SLEEP
would have been a tighter protection. As pm_sleep_ptr() lets the compiler
see the protected ops structure and callbacks but also lets the compiler
remove it as unused code if !CONFIG_PM_SLEEP this allows the #ifdef
guards to be removed, slightly simplifying the resulting code.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

--
It seems likely that DEFINE_SIMPLE_DEV_PM_OPS() would work here but
I'd prefer not to make that change unless someone can confirm that the
extra callbacks registered will have no unwanted side effects in this
driver.

Link: https://lore.kernel.org/r/20230114171620.42891-16-jic23@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: jic23

drivers/input/misc/cma3000_d0x_i2c.c

@@ -64,7 +64,6 @@ static void cma3000_i2c_remove(struct i2c_client *client)
 	cma3000_exit(data);
 }
 
-#ifdef CONFIG_PM
 static int cma3000_i2c_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
@@ -89,7 +88,6 @@ static const struct dev_pm_ops cma3000_i2c_pm_ops = {
 	.suspend	= cma3000_i2c_suspend,
 	.resume		= cma3000_i2c_resume,
 };
-#endif
 
 static const struct i2c_device_id cma3000_i2c_id[] = {
 	{ "cma3000_d01", 0 },
@@ -104,9 +102,7 @@ static struct i2c_driver cma3000_i2c_driver = {
 	.id_table	= cma3000_i2c_id,
 	.driver = {
 		.name	= "cma3000_i2c_accl",
-#ifdef CONFIG_PM
-		.pm	= &cma3000_i2c_pm_ops,
-#endif
+		.pm	= pm_sleep_ptr(&cma3000_i2c_pm_ops),
 	},
 };