Fix FMU init

src/drivers/px4fmu/fmu.cpp

@@ -405,7 +405,8 @@ PX4FMU::init()
 		return ret;
 	}
 
-	if (_mode != MODE_NONE) {
+	// XXX best would be to register / de-register the device depending on modes
+
 	/* try to claim the generic PWM output device node as well - it's OK if we fail at this */
 	_class_instance = register_class_devname(PWM_OUTPUT_BASE_DEVICE_PATH);
 
@@ -414,7 +415,6 @@ PX4FMU::init()
 	} else if (_class_instance < 0) {
 		warnx("FAILED registering class device");
 	}
-	}
 
 	_safety_disabled = circuit_breaker_enabled("CBRK_IO_SAFETY", CBRK_IO_SAFETY_KEY);