Cleanup, comment "wired" eeproms

Marlin/src/HAL/TEENSY31_32/eeprom.cpp

@@ -22,6 +22,11 @@
 
 #if USE_WIRED_EEPROM
 
+/**
+ * PersistentStore for Arduino-style EEPROM interface
+ * with implementations supplied by the framework.
+ */
+
 #include "../shared/eeprom_api.h"
 
 bool PersistentStore::access_start() { return true; }