replace <cfloat> with <float.h>

- <cfloat> isn't available in the NuttX c++ library

src/drivers/differential_pressure/ets/ets_airspeed.cpp

@@ -38,7 +38,7 @@
  * Driver for the Eagle Tree Airspeed V3 connected via I2C.
  */
 
-#include <cfloat>
+#include <float.h>
 
 #include <px4_config.h>
 

src/drivers/px4fmu/fmu.cpp

@@ -37,7 +37,7 @@
  * Driver/configurator for the PX4 FMU
  */
 
-#include <cfloat>
+#include <float.h>
 
 #include <board_config.h>
 #include <drivers/device/device.h>

src/drivers/rc_input/RCInput.hpp

@@ -33,7 +33,7 @@
 
 #pragma once
 
-#include <cfloat>
+#include <float.h>
 
 #include <board_config.h>
 #include <drivers/drv_hrt.h>