STM32 EEPROM Emulation (#3741)

* STM32 EEPROM Emulation

- Added EEPROM emulation libaries from libmaple and Arduino_STM32. https://github.com/rogerclarkmelbourne/Arduino_STM32 and https://github.com/leaflabs/libmaple.
- Renamed teensy EEPROM library and added conditional selection of library.
- Remapped EEPROM memory map for 16 byte blocks (as is with STM32f3xx MCUs).
- Added EEPROM initialization in main.c of Chibios.
- Added EEPROM format to clear the emulated pages when EEPROM is marked as invalid.

* Fixed ifdef

tmk_core/protocol/chibios/main.c

@@ -44,6 +44,9 @@
 #ifdef MIDI_ENABLE
 #include "qmk_midi.h"
 #endif
+#ifdef STM32F303xC
+#include "eeprom_stm32.h"
+#endif
 #include "suspend.h"
 #include "wait.h"
 
@@ -109,6 +112,10 @@ int main(void) {
   halInit();
   chSysInit();
 
+#ifdef STM32F303xC
+  EEPROM_init();
+#endif
+
   // TESTING
   // chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);