Cleanup, comment "wired" eeproms

Marlin/src/HAL/STM32/eeprom_wired.cpp

@@ -26,14 +26,21 @@
 
 #if USE_WIRED_EEPROM
 
+/**
+ * PersistentStore for Arduino-style EEPROM interface
+ * with simple implementations supplied by Marlin.
+ */
 
 #include "../shared/eeprom_if.h"
 #include "../shared/eeprom_api.h"
 
 size_t PersistentStore::capacity()    { return E2END + 1; }
-bool PersistentStore::access_start()  { return true; }
 bool PersistentStore::access_finish() { return true; }
 
+bool PersistentStore::access_start()  {
+  return true;
+}
+
 bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
   while (size--) {
     uint8_t v = *value;