HID: usbhid: remove #ifdef CONFIG_PM

Through the usage of pm_ptr() the CONFIG_PM-dependent code will always be
compiled, protecting against bitrot.
The linker will then garbage-collect the unused function avoiding any overhead.

Signed-off-by: Thomas Weißschuh <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Benjamin Tissoires <[e-mail]>

drivers/hid/usbhid/hid-core.c

···
 	return 0;
 }
 
-#ifdef CONFIG_PM
 static int hid_resume_common(struct hid_device *hid, bool driver_suspended)
 {
 	int status = 0;
···
 	return status;
 }
 
-#endif /* CONFIG_PM */
-
 static const struct usb_device_id hid_usb_ids[] = {
 	{ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
 		.bInterfaceClass = USB_INTERFACE_CLASS_HID },
···
 	.name =		"usbhid",
 	.probe =	usbhid_probe,
 	.disconnect =	usbhid_disconnect,
-#ifdef CONFIG_PM
-	.suspend =	hid_suspend,
-	.resume =	hid_resume,
-	.reset_resume =	hid_reset_resume,
-#endif
+	.suspend =	pm_ptr(hid_suspend),
+	.resume =	pm_ptr(hid_resume),
+	.reset_resume =	pm_ptr(hid_reset_resume),
 	.pre_reset =	hid_pre_reset,
 	.post_reset =	hid_post_reset,
 	.id_table =	hid_usb_ids,