HID: wacom: Add support for Cintiq Companion 2

Adds support for the EMR (pen+pad) and touchscreen devices used by the
Wacom Cintiq Companion 2. This applies both to using the device as a
standalone system, as well as when operating in "Cintiq mode" (where
the EMR/touchscreen are simply exposed as USB devices to the system
its connected to).

Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: Clifford Jolly <expiredpopsicle@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/wacom_sys.c

@@ -422,7 +422,7 @@ static int wacom_query_tablet_data(struct hid_device *hdev,
 			/* MT Tablet PC touch */
 			return wacom_set_device_mode(hdev, 3, 4, 4);
 		}
-		else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {
+		else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID || features->type == CINTIQ_COMPANION_2) {
 			return wacom_set_device_mode(hdev, 18, 3, 2);
 		}
 		else if (features->type == WACOM_27QHDT) {