Input: Use pm_sleep_ptr() to avoid need for ifdef CONFIG_PM_SLEEP

As the new pm_sleep_ptr() macro lets the compiler see the code, but
then remove it if !CONFIG_PM_SLEEP it can be used to avoid the need
for #ifdef guards.  Use that in the input core to simplify the code
a little.  Note pm_sleep_ptr() has not been applied to each callback
in the ops structure because the pm_sleep_ptr() at the usage site
is sufficient.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20230114171620.42891-15-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/input.c

@@ -19,6 +19,7 @@
 #include <linux/proc_fs.h>
 #include <linux/sched.h>
 #include <linux/seq_file.h>
+#include <linux/pm.h>
 #include <linux/poll.h>
 #include <linux/device.h>
 #include <linux/kstrtox.h>
@@ -1828,7 +1829,6 @@ static int input_uninhibit_device(struct input_dev *dev)
 	return ret;
 }
 
-#ifdef CONFIG_PM_SLEEP
 static int input_dev_suspend(struct device *dev)
 {
 	struct input_dev *input_dev = to_input_dev(dev);
@@ -1903,15 +1903,12 @@ static const struct dev_pm_ops input_dev_pm_ops = {
 	.poweroff	= input_dev_poweroff,
 	.restore	= input_dev_resume,
 };
-#endif /* CONFIG_PM */
 
 static const struct device_type input_dev_type = {
 	.groups		= input_dev_attr_groups,
 	.release	= input_dev_release,
 	.uevent		= input_dev_uevent,
-#ifdef CONFIG_PM_SLEEP
-	.pm		= &input_dev_pm_ops,
-#endif
+	.pm		= pm_sleep_ptr(&input_dev_pm_ops),
 };
 
 static char *input_devnode(const struct device *dev, umode_t *mode)