General cleanup

Marlin/src/gcode/control/M997.cpp

  * M997: Perform in-application firmware update
  */
 void GcodeSuite::M997() {
+
   flashFirmware(parser.intval('S'));
+
 }
 
 #endif

Marlin/src/module/settings.cpp

     #if HAS_PROBE_XY_OFFSET
       LOOP_XYZ(a) probe.offset[a] = dpo[a];
     #else
-      probe.offset.x = probe.offset.y = 0;
-      probe.offset.z = dpo[Z_AXIS];
+      probe.offset.set(0, 0, dpo[Z_AXIS]);
     #endif
   #endif