accel and gyro calibration refactor and cleanup

- remove all remaining IOCTLs for accel and gyro and handle all calibration entirely in sensors module with parameters
 - sensor_accel and sensor_gyro are now always raw sensor data
 - calibration procedures no longer need to first clear existing values before starting
 - temperature calibration (TC) remove all scale (SCL) parameters
    - gyro and baro scale are completely unused
    - regular accel calibration scale can be used (CAL_ACC*_xSCALE) instead of TC scale

src/modules/sensors/sensors.cpp

@@ -239,6 +239,8 @@ Sensors::~Sensors()
 			i->Stop();
 		}
 	}
+
+	perf_free(_loop_perf);
 }
 
 bool Sensors::init()