actuator outputs: always add reverse range param

and remove the possibility to set min > max to reverse.

Initially the idea was to add the checkbox on the UI side, to avoid adding
another param, but I don't think I'll go through the extra effort on the
QGC side.

src/drivers/linux_pwm_out/module.yaml

@@ -1,6 +1,5 @@
 module_name: PWM Output
 actuator_output:
-  add_reverse_range_param: true
   output_groups:
     - param_prefix: PWM_MAIN
       channel_label: 'Channel'

src/drivers/pwm_out/module.yaml

@@ -1,6 +1,5 @@
 module_name: '${PWM_MAIN_OR_AUX}'
 actuator_output:
-  add_reverse_range_param: true
   output_groups:
     - generator: pwm
       param_prefix: '${PWM_MAIN_OR_AUX}'

src/drivers/pwm_out_sim/module_hil.yaml

@@ -1,7 +1,6 @@
 
 module_name: HIL
 actuator_output:
-  add_reverse_range_param: true
   show_subgroups_if: 'SYS_HITL>0'
   output_groups:
     - param_prefix: HIL_ACT

src/drivers/pwm_out_sim/module_sim.yaml

@@ -1,7 +1,6 @@
 
 module_name: SIM
 actuator_output:
-  add_reverse_range_param: true
   output_groups:
     - param_prefix: PWM_MAIN
       channel_label: Channel

src/drivers/px4io/module.yaml

@@ -1,6 +1,5 @@
 module_name: PWM MAIN
 actuator_output:
-  add_reverse_range_param: true
   output_groups:
     - generator: pwm
       param_prefix: PWM_MAIN

src/drivers/uavcan/module.yaml

@@ -1,6 +1,5 @@
 module_name: UAVCAN
 actuator_output:
-  add_reverse_range_param: true
   show_subgroups_if: 'UAVCAN_ENABLE>=3'
   config_parameters:
     - param: 'UAVCAN_ENABLE'

src/drivers/uavcan_v1/module.yaml

@@ -1,6 +1,5 @@
 module_name: UAVCANv1
 actuator_output:
-  add_reverse_range_param: true
   output_groups:
     - param_prefix: UCAN1_ESC
       channel_label: 'ESC'

src/lib/mixer_module/mixer_module.cpp

@@ -193,8 +193,6 @@ void MixingOutput::updateParams()
 
 		bool function_changed = false;
 
-		_reverse_output_mask = 0;
-
 		for (unsigned i = 0; i < _max_num_outputs; i++) {
 			int32_t val;
 
@@ -219,7 +217,6 @@ void MixingOutput::updateParams()
 			}
 
 			if (_min_value[i] > _max_value[i]) {
-				_reverse_output_mask |= 1 << i;
 				uint16_t tmp = _min_value[i];
 				_min_value[i] = _max_value[i];
 				_max_value[i] = tmp;
@@ -230,10 +227,11 @@ void MixingOutput::updateParams()
 			}
 		}
 
+		_reverse_output_mask = 0;
 		int32_t rev_range_param;
 
 		if (_param_handle_rev_range != PARAM_INVALID && param_get(_param_handle_rev_range, &rev_range_param) == 0) {
-			_reverse_output_mask |= rev_range_param;
+			_reverse_output_mask = rev_range_param;
 		}
 
 		if (function_changed) {