Copter: add option to disable SPORT flight mode

Saves about 1,500 bytes

ArduCopter/APM_Config.h

@@ -27,6 +27,7 @@
 //#define MODE_LOITER_ENABLED   DISABLED            // disable loiter mode support
 //#define MODE_POSHOLD_ENABLED  DISABLED            // disable poshold mode support
 //#define MODE_SMARTRTL_ENABLED DISABLED            // disable smartrtl mode support
+//#define MODE_SPORT_ENABLED DISABLED               // disable sport mode support
 
 
 // features below are disabled by default on all boards

ArduCopter/Copter.h

@@ -980,7 +980,9 @@ private:
 #else
     ModeStabilize mode_stabilize;
 #endif
+#if MODE_SPORT_ENABLED == ENABLED
     ModeSport mode_sport;
+#endif
 #if ADSB_ENABLED == ENABLED
     ModeAvoidADSB mode_avoid_adsb;
 #endif

ArduCopter/config.h

@@ -291,6 +291,12 @@
 # define MODE_SMARTRTL_ENABLED ENABLED
 #endif
 
+//////////////////////////////////////////////////////////////////////////////
+// Sport - fly vehicle in rate-controlled (earth-frame) mode
+#ifndef MODE_SPORT_ENABLED
+# define MODE_SPORT_ENABLED ENABLED
+#endif
+
 //////////////////////////////////////////////////////////////////////////////
 // RADIO CONFIGURATION
 //////////////////////////////////////////////////////////////////////////////

ArduCopter/mode.cpp

@@ -82,9 +82,11 @@ Copter::Mode *Copter::mode_from_mode_num(const uint8_t mode)
             ret = &mode_drift;
             break;
 
+#if MODE_SPORT_ENABLED == ENABLED
         case SPORT:
             ret = &mode_sport;
             break;
+#endif
 
         case FLIP:
             ret = &mode_flip;