Add support for 5 controller inputs and POV

Change-Id: Ief67d56cf16762c3f06dcd38abab206505a029e8
diff --git a/aos/robot_state/robot_state.q b/aos/robot_state/robot_state.q
index 394d574..7eb10f5 100644
--- a/aos/robot_state/robot_state.q
+++ b/aos/robot_state/robot_state.q
@@ -12,7 +12,7 @@
 };
 
 message JoystickState {
-  Joystick[4] joysticks;
+  Joystick[6] joysticks;
 
   bool test_mode;
   bool fms_attached;