control_allocator: set default control surface type to (not set)

Before it was set to left aileron, but the torque values were all 0.

ROMFS/px4fmu_common/init.d/airframes/1002_standard_vtol.hil

@@ -76,6 +76,8 @@ param set-default CA_ROTOR4_AZ 0.0
 param set-default CA_ROTOR4_PX 0.2
 
 param set-default CA_SV_CS_COUNT 3
+param set-default CA_SV_CS0_TRQ_R -0.5
+param set-default CA_SV_CS0_TYPE 1
 param set-default CA_SV_CS1_TRQ_R 0.5
 param set-default CA_SV_CS1_TYPE 2
 param set-default CA_SV_CS2_TRQ_P 1.0

ROMFS/px4fmu_common/init.d/airframes/13030_generic_vtol_quad_tiltrotor

@@ -51,6 +51,8 @@ param set-default CA_ROTOR3_PY 0.15
 param set-default CA_ROTOR3_KM -0.05
 param set-default CA_ROTOR3_TILT 4
 param set-default CA_SV_CS_COUNT 4
+param set-default CA_SV_CS0_TYPE 1
+param set-default CA_SV_CS0_TRQ_R -0.5
 param set-default CA_SV_CS1_TRQ_R 0.5
 param set-default CA_SV_CS1_TYPE 2
 param set-default CA_SV_CS2_TRQ_P 1.0

ROMFS/px4fmu_common/init.d/airframes/2100_standard_plane

@@ -14,6 +14,7 @@ param set-default CA_AIRFRAME 1
 param set-default CA_ROTOR_COUNT 1
 param set-default CA_ROTOR0_PX 0.3
 param set-default CA_SV_CS_COUNT 4
+param set-default CA_SV_CS0_TYPE 1
 param set-default CA_SV_CS0_TRQ_R -0.5
 param set-default CA_SV_CS1_TRQ_R 0.5
 param set-default CA_SV_CS1_TYPE 2

src/modules/control_allocator/module.yaml

@@ -255,6 +255,7 @@ parameters:
                 short: Control Surface ${i} type
             type: enum
             values:
+                0: (Not set)
                 1: Left Aileron
                 2: Right Aileron
                 3: Elevator
@@ -269,7 +270,7 @@ parameters:
                 12: Custom
             num_instances: *max_num_servos
             instance_start: 0
-            default: 1
+            default: 0
 
         CA_SV_CS${i}_TRQ_R:
             description:
@@ -492,6 +493,10 @@ mixer:
         # Convention: horizontal surfaces: up=positive, vertical: right=positive, mixed: up=positive.
         # By default the scale is set to 1/N, where N is the amount of actuators with an effect on
         # the corresponding axis. With that we are using all the available servo moving range.
+            0: # Not set
+              - { 'disabled': True, 'default': 0.0 } # roll
+              - { 'disabled': True, 'default': 0.0 } # pitch
+              - { 'disabled': True, 'default': 0.0 } # yaw
             1: # Left Aileron
               - { 'min': -1.0, 'max': 0.0, 'default': -0.5 } # roll
               - { 'hidden': True, 'default': 0.0 } # pitch