README: Update TODO list now that we have Audio working

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
diff --git a/README.md b/README.md
index a36d77b..1792095 100644
--- a/README.md
+++ b/README.md
@@ -94,5 +94,5 @@
 
 ToDo -->
 * Brightness Control
-* Audio
 * Modem / RIL / Voice Call
+* Battery Stats