hid: egalax: Add support for Wetab

The Wetab tablet dual-touch controller works the same way as the one
in the Joojoo tablet. This patch adds the Wetab to the list of
supported devices, and grabs it accordingly in hid-core.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: Stephane Chatty <chatty@enac.fr>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 3341baa..b76166a 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -196,6 +196,7 @@
 #define USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER	0x0001
 #define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH	0x480d
 #define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH1	0x720c
+#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH2	0x72a1
 
 #define USB_VENDOR_ID_ELECOM		0x056e
 #define USB_DEVICE_ID_ELECOM_BM084	0x0061