pwm out: disable PWM parameter update on param change

Only update PWM params on initialisation.
Updating PWM params on param change was interfering with VTOL
parameter settings (e.g. PWM_MIN is set by VTOL at init, and
was then overwritten here after an arbitrary param change).

Signed-off-by: Silvan Fuhrer <silvan@auterion.com>

src/drivers/pwm_out/PWMOut.cpp

@@ -640,7 +640,7 @@ void PWMOut::Run()
 		_parameter_update_sub.copy(&pupdate);
 
 		// update parameters from storage
-		update_params();
+		// update_params(); // do not update PWM params for now (was interfering with VTOL PWM settings)
 	}
 
 	if (_current_update_rate == 0) {