Use IOCTL for board_read_VBUS_state in NuttX protected builds

Direct gpio read is not possible from user side applications, so use boardctl
interface instead.

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>

boards/px4/fmu-v5/src/stm32_userspace.c

@@ -143,5 +143,4 @@ int CONFIG_USER_ENTRYPOINT(int argc, char *argv[])
 	return nsh_main(argc, argv);
 }
 
-
 #endif /* !CONFIG_BUILD_FLAT && !__KERNEL__ */

platforms/common/include/px4_platform_common/board_common.h

@@ -502,7 +502,14 @@ static inline bool board_rc_invert_input(const char *device, bool invert) { retu
  *
  ************************************************************************************/
 
-#if defined(GPIO_OTGFS_VBUS)
+#if defined(__PX4_NUTTX) && !defined(CONFIG_BUILD_FLAT)
+inline static int board_read_VBUS_state(void)
+{
+	platformiocvbusstate_t state = {false};
+	boardctl(PLATFORMIOCVBUSSTATE, (uintptr_t)&state);
+	return state.ret;
+}
+#elif defined(GPIO_OTGFS_VBUS)
 #  define board_read_VBUS_state() (px4_arch_gpioread(GPIO_OTGFS_VBUS) ? 0 : 1)
 #else
 int board_read_VBUS_state(void);