samsung: add a20, a20e, a30 and a30s

Change-Id: I82a69dcb3f12672f58e79d7c78d92ad5274cf26a
diff --git a/_samsung/samsunggalaxya20.markdown b/_samsung/samsunggalaxya20.markdown
new file mode 100755
index 0000000..eec8c67
--- /dev/null
+++ b/_samsung/samsunggalaxya20.markdown
@@ -0,0 +1,27 @@
+---
+layout: device
+title: "Samsung Galaxy A20"
+codename: a20dd
+downloadfolder: a20dd
+supportstatus: Current
+maintainer: topser9
+devicetree: "https://github.com/TeamWin/android_device_samsung_a20dd"
+oem: Samsung
+ddof: "/dev/block/platform/13500000.dwmmc0/by-name/recovery"
+---
+
+{% include disclaimer.html %}
+
+{% include supportstatus.html %}
+
+{% include samsungsystemasroot.html %}
+
+{% include appinstall.html %}
+
+{% include download.html %}
+
+{% include twrpinstall.html %}
+
+{% include odininstall.html %}
+
+{% include ddinstall.html %}