new Bosch BMI088 IMU driver using FIFOs and DRDY

src/lib/drivers/accelerometer/PX4Accelerometer.hpp

@@ -97,7 +97,7 @@ private:
 
 	float			_range{16 * CONSTANTS_ONE_G};
 	float			_scale{1.f};
-	float			_temperature{0.f};
+	float			_temperature{NAN};
 
 	float			_clip_limit{_range / _scale};
 

src/lib/drivers/gyroscope/PX4Gyroscope.hpp

@@ -95,7 +95,7 @@ private:
 
 	float			_range{math::radians(2000.f)};
 	float			_scale{1.f};
-	float			_temperature{0.f};
+	float			_temperature{NAN};
 
 	uint32_t		_error_count{0};