AP_ADSB: Sagetech for 2MB only

libraries/AP_ADSB/AP_ADSB.cpp

@@ -32,6 +32,10 @@
 #include <AP_Baro/AP_Baro.h>
 #include <AP_AHRS/AP_AHRS.h>
 
+#ifndef ADSB_SAGETECH_ENABLED
+    #define ADSB_SAGETECH_ENABLED !HAL_MINIMIZE_FEATURES
+#endif
+
 
 //#define ADSB_STATIC_CALLSIGN            "APM1234"  // 8 ASCII chars of a Callsign. This can be overwritten by MAVLink msg UAVIONIX_ADSB_OUT_CFG
 
@@ -182,9 +186,12 @@ void AP_ADSB::hw_init(void)
         return;
     }
 
+#if ADSB_SAGETECH_ENABLED
     if (AP_ADSB_Sagetech::detect()) {
         backend = new AP_ADSB_Sagetech(*this);
-    } else {
+    } else
+#endif
+    {
         backend = new AP_ADSB_MAVLink(*this);
     }