HID: add multi-input quirk for eGalax Touchcontroller

I've got one of these devices on my desk and it seems that it suffers from
the ABS_Z/ABS_RX issue that we've seen in other devices before. This patch
uses the same reasoning as 9db630b48 ("HID: add multi-input quirk for NextWindow
Touchscreen").

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 9791d0a..513e75e 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -174,6 +174,9 @@
 
 #define USB_VENDOR_ID_DRAGONRISE	0x0079
 
+#define USB_VENDOR_ID_EGALAX		0x0EEF
+#define USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER	0x0001
+
 #define USB_VENDOR_ID_ELO		0x04E7
 #define USB_DEVICE_ID_ELO_TS2700	0x0020