Move MSG_MARLIN

Marlin/src/MarlinCore.cpp

   if (mcu & 32) SERIAL_ECHOLNPGM(MSG_SOFTWARE_RESET);
   HAL_clear_reset_source();
 
-  SERIAL_ECHOPGM(MSG_MARLIN);
+  serialprintPGM(GET_TEXT(MSG_MARLIN));
   SERIAL_CHAR(' ');
   SERIAL_ECHOLNPGM(SHORT_BUILD_VERSION);
   SERIAL_EOL();

Marlin/src/core/language.h

 
 #endif
 
-// Common LCD messages
-
-  /* nothing here yet */
-
-// Common serial messages
-#define MSG_MARLIN "Marlin"
-
-// Serial Console Messages (do not translate those!)
+// Common Serial Console Messages (do not translate those!)
 
 #define MSG_ENQUEUEING                      "enqueueing \""
 #define MSG_POWERUP                         "PowerUp"

Marlin/src/lcd/language/language_en.h

   PROGMEM Language_Str LANGUAGE                            = _UxGT("English");
 
   PROGMEM Language_Str WELCOME_MSG                         = MACHINE_NAME _UxGT(" Ready.");
+  PROGMEM Language_Str MSG_MARLIN                          = _UxGT("Marlin");
   PROGMEM Language_Str MSG_YES                             = _UxGT("YES");
   PROGMEM Language_Str MSG_NO                              = _UxGT("NO");
   PROGMEM Language_Str MSG_BACK                            = _UxGT("Back");

Marlin/src/lcd/menu/menu_info.cpp

   void menu_info_printer() {
     if (ui.use_click()) return ui.go_back();
     START_SCREEN();
-    STATIC_ITEM_P(PSTR(MSG_MARLIN), SS_CENTER|SS_INVERT);       // Marlin
+    STATIC_ITEM(MSG_MARLIN, SS_CENTER|SS_INVERT);               // Marlin
     STATIC_ITEM_P(PSTR(SHORT_BUILD_VERSION));                   // x.x.x-Branch
     STATIC_ITEM_P(PSTR(STRING_DISTRIBUTION_DATE));              // YYYY-MM-DD HH:MM
     STATIC_ITEM_P(PSTR(MACHINE_NAME));                          // My3DPrinter