charger: Add 640dpi support

* xxxhdpi

Change-Id: I53f86c3bf68d8ba3ad21273b44f75ea6434d7883
Signed-off-by: Brandon McAnsh <brandon.mcansh@gmail.com>
diff --git a/charger/fonts/640dpi b/charger/fonts/640dpi
new file mode 120000
index 0000000..de2fe91
--- /dev/null
+++ b/charger/fonts/640dpi
@@ -0,0 +1 @@
+xxxhdpi
diff --git a/charger/images/640dpi b/charger/images/640dpi
new file mode 120000
index 0000000..de2fe91
--- /dev/null
+++ b/charger/images/640dpi
@@ -0,0 +1 @@
+xxxhdpi