Rover: Log_Write_SIMSTATE no longer takes dataflash pointer

APMrover2/Log.cpp

@@ -50,7 +50,7 @@ void Rover::Log_Write_Attitude()
         DataFlash.Log_Write_PID(LOG_PIDR_MSG, g2.attitude_control.get_sailboat_heel_pid().get_pid_info());
     }
 #if CONFIG_HAL_BOARD == HAL_BOARD_SITL
-    sitl.Log_Write_SIMSTATE(&DataFlash);
+    sitl.Log_Write_SIMSTATE();
 #endif
 }