MPU6K: Fix device ID

src/drivers/mpu6000/mpu6000.cpp

@@ -2030,8 +2030,8 @@ MPU6000::measure()
 	arb.temperature_raw = report.temp;
 	arb.temperature = _last_temperature;
 
-	/* Return class instance as a surrogate device ID */
-	arb.device_id = _accel_class_instance;
+	/* return device ID */
+	arb.device_id = _device_id;
 
 	grb.x_raw = report.gyro_x;
 	grb.y_raw = report.gyro_y;
@@ -2066,8 +2066,8 @@ MPU6000::measure()
 	grb.temperature_raw = report.temp;
 	grb.temperature = _last_temperature;
 
-	/* Return class instance as a surrogate device ID */
-	grb.device_id = _gyro->_gyro_class_instance;
+	/* return device ID */
+	grb.device_id = _gyro->_device_id;
 
 	_accel_reports->force(&arb);
 	_gyro_reports->force(&grb);
@@ -2345,7 +2345,7 @@ fail:
 	}
 
 	if (bus.dev != nullptr) {
-		delete(bus.dev);
+		delete bus.dev;
 		bus.dev = nullptr;
 	}