Fix Due EEPROM write bug

See #13065

Marlin/src/HAL/HAL_DUE/persistent_store_eeprom.cpp

@@ -52,6 +52,7 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
     // so only write bytes that have changed!
     if (v != eeprom_read_byte(p)) {
       eeprom_write_byte(p, v);
+      delay(2);
       if (eeprom_read_byte(p) != v) {
         SERIAL_ECHO_MSG(MSG_ERR_EEPROM_WRITE);
         return true;