sinowealth: add a lift off distance value to config report

src/driver-sinowealth.c

@@ -145,6 +145,7 @@ struct sinowealth_config_report {
 	uint8_t unknown4;
 	/* 0x1 - 2 mm
 	 * 0x2 - 3 mm
+	 * 0xff - indicates that lift off distance is changed with a dedicated command. Not constant, so do **NOT** overwrite it.
 	 */
 	uint8_t lift_off_distance;
 	uint8_t unknown5[36];