🩹 Fix non-PWM cutter compile (#23169)

buildroot/tests/mega1280

@@ -27,6 +27,12 @@ opt_enable SPINDLE_FEATURE ULTIMAKERCONTROLLER LCD_BED_LEVELING \
            EXTERNAL_CLOSED_LOOP_CONTROLLER POWER_MONITOR_CURRENT POWER_MONITOR_VOLTAGE
 exec_test $1 $2 "Spindle, MESH_BED_LEVELING, closed loop, Power Monitor, and LCD" "$3"
 
+#
+# ...and without PWM
+#
+opt_disable SPINDLE_LASER_USE_PWM
+exec_test $1 $2 "(No PWM)" "$3"
+
 #
 # Test DUAL_X_CARRIAGE
 #