Add XDA thread URL for Samsung Galaxy Tab S2 9.7 WiFi (2016)

Change-Id: I737d55152bdd5282c6333d15054f3c973a4265a4
diff --git a/_devices/samsunggalaxytabs297wifi2016.markdown b/_devices/samsunggalaxytabs297wifi2016.markdown
index ad6a768..8e5f4f4 100644
--- a/_devices/samsunggalaxytabs297wifi2016.markdown
+++ b/_devices/samsunggalaxytabs297wifi2016.markdown
@@ -8,7 +8,7 @@
 oem: Samsung
 ddof: "/dev/block/bootdevice/by-name/recovery"
 devicetree: "https://github.com/TeamWin/android_device_samsung_gts210vewifi"
-xdathread: ""
+xdathread: "http://forum.xda-developers.com/showthread.php?t=3543921"
 ---
 
 {% include disclaimer.html %}