HID: add missing \n to end of dev_warn messages

Trival fix, dev_warn messages are missing a \n, so add it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

include/linux/hid.h

@@ -837,7 +837,7 @@ __u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
  */
 static inline void hid_device_io_start(struct hid_device *hid) {
 	if (hid->io_started) {
-		dev_warn(&hid->dev, "io already started");
+		dev_warn(&hid->dev, "io already started\n");
 		return;
 	}
 	hid->io_started = true;
@@ -857,7 +857,7 @@ static inline void hid_device_io_start(struct hid_device *hid) {
  */
 static inline void hid_device_io_stop(struct hid_device *hid) {
 	if (!hid->io_started) {
-		dev_warn(&hid->dev, "io already stopped");
+		dev_warn(&hid->dev, "io already stopped\n");
 		return;
 	}
 	hid->io_started = false;