sf1xx: Fix max distance for SF/LW20/b

src/drivers/distance_sensor/sf1xx/parameters.c

@@ -43,6 +43,7 @@
  * @value 2 SF10/b
  * @value 3 SF10/c
  * @value 4 SF11/c
- * @value 5 SF/LW20
+ * @value 5 SF/LW20/b
+ * @value 6 SF/LW20/c
  */
 PARAM_DEFINE_INT32(SENS_EN_SF1XX, 0);

src/drivers/distance_sensor/sf1xx/sf1xx.cpp

@@ -233,7 +233,14 @@ SF1XX::init()
 		break;
 
 	case 5:
-		/* SF20/LW20 (100m 48-388Hz) */
+		/* SF/LW20/b (50m 48-388Hz) */
+		_min_distance = 0.001f;
+		_max_distance = 50.0f;
+		_conversion_interval = 20834;
+		break;
+
+	case 6:
+		/* SF/LW20/c (100m 48-388Hz) */
 		_min_distance = 0.001f;
 		_max_distance = 100.0f;
 		_conversion_interval = 20834;