Tracker: split SIMSTATE, AHRS2 and AHRS3 onto their own ap_message ids

AntennaTracker/GCS_Mavlink.cpp

@@ -269,7 +269,9 @@ static const ap_message STREAM_EXTRA1_msgs[] = {
 static const ap_message STREAM_EXTRA3_msgs[] = {
     MSG_AHRS,
     MSG_HWSTATUS,
-    MSG_SIMSTATE, // SIMSTATE, AHRS2
+    MSG_SIMSTATE,
+    MSG_AHRS2,
+    MSG_AHRS3,
     MSG_MAG_CAL_REPORT,
     MSG_MAG_CAL_PROGRESS,
 };