stop manually defining physical constants

src/drivers/telemetry/frsky_telemetry/CMakeLists.txt

@@ -36,9 +36,9 @@ px4_add_module(
 	STACK_MAIN 1200
 	COMPILE_FLAGS
 	SRCS
-		frsky_data.c
-		sPort_data.c
-		frsky_telemetry.c
+		frsky_data.cpp
+		sPort_data.cpp
+		frsky_telemetry.cpp
 	DEPENDS
 		platforms__common
 	)

src/drivers/telemetry/frsky_telemetry/frsky_data.cpp

@@ -47,9 +47,9 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdbool.h>
-#include <arch/math.h>
 #include <lib/ecl/geo/geo.h>
 #include <stdbool.h>
+#include <math.h>
 
 #include <uORB/topics/battery_status.h>
 #include <uORB/topics/sensor_combined.h>

src/drivers/telemetry/frsky_telemetry/frsky_telemetry.cpp

@@ -79,8 +79,8 @@ static int sPort_open_uart(const char *uart_name, struct termios *uart_config, s
 static int set_uart_speed(int uart, struct termios *uart_config, speed_t speed);
 static void usage(void);
 static int frsky_telemetry_thread_main(int argc, char *argv[]);
-__EXPORT int frsky_telemetry_main(int argc, char *argv[]);
 
+extern "C" __EXPORT int frsky_telemetry_main(int argc, char *argv[]);
 
 uint16_t get_telemetry_flight_mode(int px4_flight_mode)
 {

src/drivers/telemetry/frsky_telemetry/sPort_data.cpp

@@ -47,7 +47,8 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <arch/math.h>
+#include <math.h>
+
 #include <lib/ecl/geo/geo.h>
 
 #include <uORB/topics/battery_status.h>