HID: multitouch: Fix Iiyama ProLite T1931SAW (0eef:0001 again!)

Iiyama ProLite T1931SAW does not work with Linux - input devices are
created but cursor does not move.

It has the infamous 0eef:0001 ID which has been reused for various
devices before.

It seems to require export_all_inputs = true.

Hopefully there are no HID devices using this ID that will break.
It should not break non-HID devices (handled by usbtouchscreen).
Signed-off-by: Ondrej Zary <linux@zary.sk>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-multitouch.c

@@ -1888,6 +1888,11 @@ static const struct hid_device_id mt_devices[] = {
 		MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
 			USB_DEVICE_ID_CVTOUCH_SCREEN) },
 
+	/* eGalax devices (SAW) */
+	{ .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
+		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
+			USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER) },
+
 	/* eGalax devices (resistive) */
 	{ .driver_data = MT_CLS_EGALAX,
 		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,