Update sf1xx.cpp

Spaces to Tabs.

src/drivers/sf1xx/sf1xx.cpp

@@ -260,12 +260,12 @@ SF1XX::init()
 		_conversion_interval = 50000;
 		break;
 
-        case 5:
-                /* SF20/LW20 (100m 48-388Hz) */
-                _min_distance = 0.001f;
-                _max_distance = 100.0f;
-                _conversion_interval = 20834;
-                break;
+	case 5:
+		/* SF20/LW20 (100m 48-388Hz) */
+		_min_distance = 0.001f;
+		_max_distance = 100.0f;
+		_conversion_interval = 20834;
+		break;
 
 	default:
 		DEVICE_LOG("invalid HW model %d.", hw_model);