devices:Add Xiaomi Redmi 4X(santoni)

Change-Id: I7e3aa2a6238ce1a832a3935bf2120c79f8183249
Signed-off-by: IsaacChen <tingyi364@gmail.com>
diff --git a/_devices/xiaomiredmi4x.markdown b/_devices/xiaomiredmi4x.markdown
new file mode 100644
index 0000000..4e84b3a
--- /dev/null
+++ b/_devices/xiaomiredmi4x.markdown
@@ -0,0 +1,29 @@
+---
+layout: device
+title:  "Xiaomi Redmi 4X"
+codename: santoni
+downloadfolder: santoni
+supportstatus: Current
+maintainer: Isaac Chen
+devicetree: https://github.com/TeamWin/android_device_xiaomi_santoni.git
+oem: Xiaomi
+ddof: "/dev/block/bootdevice/by-name/recovery"
+---
+
+{% include disclaimer.html %}
+
+{% include supportstatus.html %}
+
+{% include dmverity.html %}
+
+{% include xiaomiunlock.html %}
+
+{% include appinstall.html %}
+
+{% include download.html %}
+
+{% include twrpinstall.html %}
+
+{% include fastbootinstall.html %}
+
+{% include ddinstall.html %}