Add customisable EEPROM driver selection (#7274)

- uprintf -> dprintf
- Fix atsam "vendor" eeprom.
- Bump Kinetis K20x to 64 bytes, too.
- Rollback Kinetis to 32 bytes as partitioning can only be done once. Add warning about changing the value.
- Change RAM-backed "fake" EEPROM implementations to match eeconfig's current usage.
- Add 24LC128 by request.

quantum/audio/audio_arm.c

@@ -258,7 +258,7 @@ void audio_init() {
     }
 
 // Check EEPROM
-#if defined(STM32_EEPROM_ENABLE) || defined(PROTOCOL_ARM_ATSAM) || defined(EEPROM_SIZE)
+#ifdef EEPROM_ENABLE
     if (!eeconfig_is_enabled()) {
         eeconfig_init();
     }