CollisionPrevention: address https://github.com/PX4/Firmware/pull/12179

review comments

msg/distance_sensor.msg

@@ -27,4 +27,4 @@ uint8 ROTATION_CUSTOM          =100 # MAV_SENSOR_ROTATION_CUSTOM
 
 float32 h_fov # Sensor horizontal field of view (rad)
 float32 v_fov # Sensor vertical field of view (rad)
-float32[4] q # Quaterion sensor orientation to specify the orientation ROTATION_CUSTOM
+float32[4] q # Quaterion sensor orientation with respect to the vehicle body frame to specify the orientation ROTATION_CUSTOM

src/drivers/distance_sensor/cm8jl65/module.yaml

@@ -22,6 +22,5 @@ parameters:
                 0: ROTATION_FORWARD_FACING
                 6: ROTATION_LEFT_FACING
                 2: ROTATION_RIGHT_FACING
-                100: ROTATION_CUSTOM
             reboot_required: true
             default: 25

src/lib/CollisionPrevention/CollisionPrevention.cpp

@@ -126,7 +126,7 @@ void CollisionPrevention::_updateDistanceSensor(obstacle_distance_s &obstacle)
 				obstacle.timestamp = distance_sensor.timestamp;
 				obstacle.max_distance = distance_sensor.max_distance * 100; // convert to cm
 				obstacle.min_distance = distance_sensor.min_distance * 100; // convert to cm
-				memset(&obstacle.distances[0], UINT16_MAX, sizeof(obstacle.distances));
+				memset(&obstacle.distances[0], 0xff, sizeof(obstacle.distances));
 				obstacle.increment = math::degrees(distance_sensor.h_fov);
 				obstacle.angle_offset = 0.f;
 			}