HID: add multi-input quirk for NextWindow Touchscreen.

These touchscreens are mounted onto HP TouchSmart and the Dell Studio One
19. Without a quirk they report a wrong button set and the x/y coordinates
through ABS_Z/ABS_RX, confusing the higher levels (most notably X.Org's
evdev driver).

Device id 0x003 covers models 1900, 2150, and 2700 [1] though testing could
only be performed on a model 1900.

[1] http://www.nextwindow.com/nextwindow_support/latest_tech_info.html

Signed-off-by: Peter Hutterer <peter.hutterer@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 656c015..0ceabbb 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -347,6 +347,9 @@
 #define USB_VENDOR_ID_NEC		0x073e
 #define USB_DEVICE_ID_NEC_USB_GAME_PAD	0x0301
 
+#define USB_VENDOR_ID_NEXTWINDOW	0x1926
+#define USB_DEVICE_ID_NEXTWINDOW_TOUCHSCREEN	0x0003
+
 #define USB_VENDOR_ID_NTRIG                0x1b96
 #define USB_DEVICE_ID_NTRIG_TOUCH_SCREEN   0x0001